refactor: Inline get_rpc_proxy

diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py
index cef14a67..dbf2e6f0 100755
--- a/test/functional/test_framework/test_node.py
+++ b/test/functional/test_framework/test_node.py
@@ -24,9 +24,11 @@ from collections.abc import Iterable
 from pathlib import Path
 
 from .authproxy import (
+    AuthServiceProxy,
     JSONRPCException,
     serialization_fallback,
 )
+from . import coverage
 from .messages import NODE_P2P_V2
 from .p2p import P2P_SERVICES, P2P_SUBVERSION
 from .util import (
@@ -36,7 +38,6 @@ from .util import (
     append_config,
     delete_cookie_file,
     get_auth_cookie,
-    get_rpc_proxy,
     rpc_port,
     wait_until_helper_internal,
     p2p_port,
@@ -200,7 +201,7 @@ class TestNode():
         self.process = None
         self.rpc_connected = False
         self._rpc = None # Should usually not be accessed directly in tests to allow for --usecli mode
-        self.reuse_http_connections = True # Must be set before calling get_rpc_proxy() i.e. before restarting node
+        self.reuse_http_connections = True # Must be set before create_new_rpc_connection(), i.e. before restarting node
         self.url = None
         self.log = logging.getLogger('TestFramework.node%d' % i)
         # Cache perf subprocesses here by their data output filename.
@@ -320,12 +321,10 @@ class TestNode():
                 host = self.rpchost
         if mode == RPCConnectionType.AUTHPROXY:
             rpc_u, rpc_p = get_auth_cookie(self.datadir_path, self.chain)
-            rpc = get_rpc_proxy(
-                f"http://{rpc_u}:{rpc_p}@{host}:{port}",
-                self.index,
-                timeout=client_timeout,
-                coveragedir=self.coverage_dir,
-            )
+            url = f"http://{rpc_u}:{rpc_p}@{host}:{port}"
+            proxy = AuthServiceProxy(url, timeout=int(client_timeout))
+            coverage_logfile = coverage.get_filename(self.coverage_dir, self.index) if self.coverage_dir else None
+            rpc = coverage.AuthServiceProxyWrapper(proxy, url, coverage_logfile)
             rpc.auth_service_proxy_instance.reuse_http_connections = self.reuse_http_connections
             return rpc
         else:  # mode==CLI
diff --git a/test/functional/test_framework/util.py b/test/functional/test_framework/util.py
index aa3cdf36..d225f18e 100644
--- a/test/functional/test_framework/util.py
+++ b/test/functional/test_framework/util.py
@@ -20,8 +20,7 @@ import shlex
 import time
 import types
 
-from . import coverage
-from .authproxy import AuthServiceProxy, JSONRPCException
+from .authproxy import JSONRPCException
 from .descriptors import descsum_create
 from collections.abc import Callable
 from typing import Optional, Union
@@ -478,32 +477,6 @@ class PortSeed:
     # Must be initialized with a unique integer for each process
     n = None
 
-
-def get_rpc_proxy(url: str, node_number: int, *, timeout: Optional[int]=None, coveragedir: Optional[str]=None) -> coverage.AuthServiceProxyWrapper:
-    """
-    Args:
-        url: URL of the RPC server to call
-        node_number: the node number (or id) that this calls to
-
-    Kwargs:
-        timeout: HTTP timeout in seconds
-        coveragedir: Directory
-
-    Returns:
-        AuthServiceProxy. convenience object for making RPC calls.
-
-    """
-    proxy_kwargs = {}
-    if timeout is not None:
-        proxy_kwargs['timeout'] = int(timeout)
-
-    proxy = AuthServiceProxy(url, **proxy_kwargs)
-
-    coverage_logfile = coverage.get_filename(coveragedir, node_number) if coveragedir else None
-
-    return coverage.AuthServiceProxyWrapper(proxy, url, coverage_logfile)
-
-
 def p2p_port(n):
     assert n <= MAX_NODES
     return PORT_MIN + n + (MAX_NODES * PortSeed.n) % (PORT_RANGE - 1 - MAX_NODES)