test: Remove convert_to_json_for_cli

diff --git a/test/functional/feature_assumeutxo.py b/test/functional/feature_assumeutxo.py
index fc3c359c..20ebd823 100755
--- a/test/functional/feature_assumeutxo.py
+++ b/test/functional/feature_assumeutxo.py
@@ -481,7 +481,7 @@ class AssumeutxoTest(BitcoinTestFramework):
 
         # Use a hash instead of a height
         prev_snap_hash = n0.getblockhash(prev_snap_height)
-        dump_output5 = n0.dumptxoutset('utxos5.dat', rollback=self.convert_to_json_for_cli(prev_snap_hash))
+        dump_output5 = n0.dumptxoutset('utxos5.dat', rollback=prev_snap_hash)
         assert_equal(sha256sum_file(dump_output4['path']), sha256sum_file(dump_output5['path']))
 
         # Ensure n0 is back at the tip
diff --git a/test/functional/feature_coinstatsindex.py b/test/functional/feature_coinstatsindex.py
index 13f321bc..6405be41 100755
--- a/test/functional/feature_coinstatsindex.py
+++ b/test/functional/feature_coinstatsindex.py
@@ -103,7 +103,7 @@ class CoinStatsIndexTest(BitcoinTestFramework):
             assert_equal(res0, res2)
 
             # Fetch old stats by hash
-            res3 = index_node.gettxoutsetinfo(hash_option, self.convert_to_json_for_cli(res0['bestblock']))
+            res3 = index_node.gettxoutsetinfo(hash_option, res0['bestblock'])
             del res3['block_info'], res3['total_unspendable_amount']
             res3.pop('muhash', None)
             assert_equal(res0, res3)
@@ -242,7 +242,7 @@ class CoinStatsIndexTest(BitcoinTestFramework):
         assert_equal(res12, res10)
 
         self.log.info("Test obtaining info for a non-existent block hash")
-        assert_raises_rpc_error(-5, "Block not found", index_node.gettxoutsetinfo, hash_type="none", hash_or_height=self.convert_to_json_for_cli("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"), use_index=True)
+        assert_raises_rpc_error(-5, "Block not found", index_node.gettxoutsetinfo, hash_type="none", hash_or_height="ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", use_index=True)
 
     def _test_use_index_option(self):
         self.log.info("Test use_index option for nodes running the index")
@@ -277,7 +277,7 @@ class CoinStatsIndexTest(BitcoinTestFramework):
         assert_not_equal(res["muhash"], res_invalid["muhash"])
 
         # Test that requesting reorged out block by hash is still returning correct results
-        res_invalid2 = index_node.gettxoutsetinfo(hash_type='muhash', hash_or_height=self.convert_to_json_for_cli(reorg_block))
+        res_invalid2 = index_node.gettxoutsetinfo(hash_type='muhash', hash_or_height=reorg_block)
         assert_equal(res_invalid2["muhash"], res_invalid["muhash"])
         assert_not_equal(res["muhash"], res_invalid2["muhash"])
 
diff --git a/test/functional/feature_index_prune.py b/test/functional/feature_index_prune.py
index 1b28de59..81c75f2f 100755
--- a/test/functional/feature_index_prune.py
+++ b/test/functional/feature_index_prune.py
@@ -67,7 +67,7 @@ class FeatureIndexPruneTest(BitcoinTestFramework):
         for node in filter_nodes:
             assert_greater_than(len(node.getblockfilter(tip)['filter']), 0)
         for node in stats_nodes:
-            assert node.gettxoutsetinfo(hash_type="muhash", hash_or_height=self.convert_to_json_for_cli(tip))['muhash']
+            assert node.gettxoutsetinfo(hash_type="muhash", hash_or_height=tip)['muhash']
 
         self.generate(self.nodes[0], 500)
         self.sync_index(height=700)
@@ -85,14 +85,14 @@ class FeatureIndexPruneTest(BitcoinTestFramework):
         for node in filter_nodes:
             assert_greater_than(len(node.getblockfilter(tip)['filter']), 0)
         for node in stats_nodes:
-            assert node.gettxoutsetinfo(hash_type="muhash", hash_or_height=self.convert_to_json_for_cli(tip))['muhash']
+            assert node.gettxoutsetinfo(hash_type="muhash", hash_or_height=tip)['muhash']
 
         self.log.info("check if we can access the blockfilter and coinstats of a pruned block")
         height_hash = self.nodes[0].getblockhash(2)
         for node in filter_nodes:
             assert_greater_than(len(node.getblockfilter(height_hash)['filter']), 0)
         for node in stats_nodes:
-            assert node.gettxoutsetinfo(hash_type="muhash", hash_or_height=self.convert_to_json_for_cli(height_hash))['muhash']
+            assert node.gettxoutsetinfo(hash_type="muhash", hash_or_height=height_hash)['muhash']
 
         # mine and sync index up to a height that will later be the pruneheight
         self.generate(self.nodes[0], 51)
@@ -106,7 +106,7 @@ class FeatureIndexPruneTest(BitcoinTestFramework):
             assert_raises_rpc_error(-1, msg, node.getblockfilter, height_hash)
         for node in stats_nodes:
             msg = "Querying specific block heights requires coinstatsindex"
-            assert_raises_rpc_error(-8, msg, node.gettxoutsetinfo, "muhash", self.convert_to_json_for_cli(height_hash))
+            assert_raises_rpc_error(-8, msg, node.gettxoutsetinfo, "muhash", height_hash)
 
         self.generate(self.nodes[0], 749)
 
diff --git a/test/functional/rpc_getblockstats.py b/test/functional/rpc_getblockstats.py
index 67452cac..7def4f8f 100755
--- a/test/functional/rpc_getblockstats.py
+++ b/test/functional/rpc_getblockstats.py
@@ -119,7 +119,7 @@ class GetblockstatsTest(BitcoinTestFramework):
 
             # Check selecting block by hash too
             blockhash = self.expected_stats[i]['blockhash']
-            stats_by_hash = self.nodes[0].getblockstats(hash_or_height=self.convert_to_json_for_cli(blockhash))
+            stats_by_hash = self.nodes[0].getblockstats(hash_or_height=blockhash)
             assert_equal(stats_by_hash, self.expected_stats[i])
 
         # Make sure each stat can be queried on its own
@@ -161,10 +161,10 @@ class GetblockstatsTest(BitcoinTestFramework):
                                 self.nodes[0].getblockstats, hash_or_height=1, stats=['minfee', f'aaa{inv_sel_stat}'])
         # Mainchain's genesis block shouldn't be found on regtest
         assert_raises_rpc_error(-5, 'Block not found', self.nodes[0].getblockstats,
-                                hash_or_height=self.convert_to_json_for_cli('000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f'))
+                                hash_or_height='000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f')
 
         # Invalid number of args
-        assert_raises_rpc_error(-1, 'getblockstats hash_or_height ( stats )', self.nodes[0].getblockstats, self.convert_to_json_for_cli('00'), 1, 2)
+        assert_raises_rpc_error(-1, 'getblockstats hash_or_height ( stats )', self.nodes[0].getblockstats, '00', 1, 2)
         assert_raises_rpc_error(-1, 'getblockstats hash_or_height ( stats )', self.nodes[0].getblockstats)
 
         self.log.info('Test block height 0')
@@ -185,7 +185,7 @@ class GetblockstatsTest(BitcoinTestFramework):
         self.log.info("Test when only header is known")
         block = self.generateblock(self.nodes[0], output="raw(55)", transactions=[], submit=False)
         self.nodes[0].submitheader(block["hex"])
-        assert_raises_rpc_error(-1, "Block not available (not fully downloaded)", lambda: self.nodes[0].getblockstats(self.convert_to_json_for_cli(block['hash'])))
+        assert_raises_rpc_error(-1, "Block not available (not fully downloaded)", lambda: self.nodes[0].getblockstats(block['hash']))
 
         self.log.info('Test when block is missing')
         (self.nodes[0].blocks_path / 'blk00000.dat').rename(self.nodes[0].blocks_path / 'blk00000.dat.backup')
diff --git a/test/functional/test_framework/test_framework.py b/test/functional/test_framework/test_framework.py
index 1ec10b28..47339761 100755
--- a/test/functional/test_framework/test_framework.py
+++ b/test/functional/test_framework/test_framework.py
@@ -8,7 +8,6 @@ import configparser
 from enum import Enum
 import argparse
 from datetime import datetime, timezone
-import json
 import logging
 import os
 import platform
@@ -1106,11 +1105,6 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
     def has_blockfile(self, node, filenum: str):
         return (node.blocks_path/ f"blk{filenum}.dat").is_file()
 
-    def convert_to_json_for_cli(self, text):
-        if self.options.usecli:
-            return json.dumps(text)
-        return text
-
     def inspect_sqlite_db(self, path, fn, *args, **kwargs):
         try:
             import sqlite3 # type: ignore[import]
@@ -1121,4 +1115,3 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
             return result
         except ImportError:
             self.log.warning("sqlite3 module not available, skipping tests that inspect the database")
-
diff --git a/test/functional/wallet_reorgsrestore.py b/test/functional/wallet_reorgsrestore.py
index c8dc24cb..00693db8 100755
--- a/test/functional/wallet_reorgsrestore.py
+++ b/test/functional/wallet_reorgsrestore.py
@@ -104,7 +104,7 @@ class ReorgsRestoreTest(BitcoinTestFramework):
 
         # Disconnect tip and sync wallet state
         tip = wallet.getbestblockhash()
-        tip_height = wallet.getblockstats(hash_or_height=self.convert_to_json_for_cli(tip))["height"]
+        tip_height = wallet.getblockstats(hash_or_height=tip)["height"]
         wallet.invalidateblock(tip)
         wallet.syncwithvalidationinterfacequeue()