tests: lnpeer/onion_msg: rm dead code

diff --git a/tests/test_lnpeer.py b/tests/test_lnpeer.py
index 536a21e..3bc39c6 100644
--- a/tests/test_lnpeer.py
+++ b/tests/test_lnpeer.py
@@ -196,7 +196,6 @@ class MockLNWallet(Logger, EventListener, NetworkRetryManager[LNPeerAddr]):
         self.features |= LnFeatures.OPTION_SCID_ALIAS_OPT
         self.features |= LnFeatures.OPTION_STATIC_REMOTEKEY_OPT
         self.config.ENABLE_ANCHOR_CHANNELS = has_anchors
-        self.pending_payments = defaultdict(asyncio.Future)
         for chan in chans:
             chan.lnworker = self
         self._peers = {}  # bytes -> Peer
@@ -226,9 +225,6 @@ class MockLNWallet(Logger, EventListener, NetworkRetryManager[LNPeerAddr]):
     def clear_invoices_cache(self):
         pass
 
-    def pay_scheduled_invoices(self):
-        pass
-
     def get_invoice_status(self, key):
         pass
 
@@ -314,7 +310,6 @@ class MockLNWallet(Logger, EventListener, NetworkRetryManager[LNPeerAddr]):
     pay_invoice = LNWallet.pay_invoice
     force_close_channel = LNWallet.force_close_channel
     schedule_force_closing = LNWallet.schedule_force_closing
-    get_first_timestamp = lambda self: 0
     on_peer_successfully_established = LNWallet.on_peer_successfully_established
     get_channel_by_id = LNWallet.get_channel_by_id
     channels_for_peer = LNWallet.channels_for_peer
diff --git a/tests/test_onion_message.py b/tests/test_onion_message.py
index 4e381d6..76e09a2 100644
--- a/tests/test_onion_message.py
+++ b/tests/test_onion_message.py
@@ -24,8 +24,8 @@ from electrum.onion_message import (
 from electrum.util import bfh, read_json_file, OldTaskGroup, get_asyncio_loop
 from electrum.logging import console_stderr_handler
 
-from . import ElectrumTestCase, test_lnpeer
-from .test_lnpeer import PutIntoOthersQueueTransport, PeerInTests, keypair
+from . import ElectrumTestCase
+from .test_lnpeer import keypair, MockLNWallet
 
 TIME_STEP = 0.01  # run tests 100 x faster
 OnionMessageManager.SLEEP_DELAY *= TIME_STEP
@@ -273,21 +273,6 @@ class MockNetwork:
         self.config.EXPERIMENTAL_LN_FORWARD_PAYMENTS = True
 
 
-class MockWallet:
-    def __init__(self):
-        pass
-
-
-class MockLNWallet(test_lnpeer.MockLNWallet):
-
-    async def add_peer(self, connect_str: str):
-        t1 = PutIntoOthersQueueTransport(self.node_keypair, 'test')
-        p1 = PeerInTests(self, keypair().pubkey, t1)
-        self.peers[p1.pubkey] = p1
-        p1.initialized.set_result(True)
-        return p1
-
-
 class MockPeer:
     their_features = LnFeatures(LnFeatures.OPTION_ONION_MESSAGE_OPT)