[rpc] Remove signrawtransaction warning

signrawtransaction was deprecated in 0.17 and removed in 0.18. A warning
was left in place to tell users to migrate to using
signrawtransactionswithwallet or signrawtransactionwithkey. Remove the
warning now that it's been two releases since the method was removed.

src/qt/rpcconsole.cpp

@@ -69,7 +69,6 @@ const QStringList historyFilter = QStringList()
     << "importmulti"
     << "sethdseed"
     << "signmessagewithprivkey"
-    << "signrawtransaction"
     << "signrawtransactionwithkey"
     << "walletpassphrase"
     << "walletpassphrasechange"

src/rpc/rawtransaction.cpp

@@ -1021,14 +1021,6 @@ static UniValue signrawtransactionwithkey(const JSONRPCRequest& request)
     return SignTransaction(*g_rpc_interfaces->chain, mtx, request.params[2], &keystore, true, request.params[3]);
 }
 
-UniValue signrawtransaction(const JSONRPCRequest& request)
-{
-    // This method should be removed entirely in V0.19, along with the entries in the
-    // CRPCCommand table and rpc/client.cpp.
-    throw JSONRPCError(RPC_METHOD_DEPRECATED, "signrawtransaction was removed in v0.18.\n"
-        "Clients should transition to using signrawtransactionwithkey and signrawtransactionwithwallet");
-}
-
 static UniValue sendrawtransaction(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
@@ -2078,7 +2070,6 @@ static const CRPCCommand commands[] =
     { "rawtransactions",    "decodescript",                 &decodescript,              {"hexstring"} },
     { "rawtransactions",    "sendrawtransaction",           &sendrawtransaction,        {"hexstring","allowhighfees|maxfeerate"} },
     { "rawtransactions",    "combinerawtransaction",        &combinerawtransaction,     {"txs"} },
-    { "hidden",             "signrawtransaction",           &signrawtransaction,        {"hexstring","prevtxs","privkeys","sighashtype"} },
     { "rawtransactions",    "signrawtransactionwithkey",    &signrawtransactionwithkey, {"hexstring","privkeys","prevtxs","sighashtype"} },
     { "rawtransactions",    "testmempoolaccept",            &testmempoolaccept,         {"rawtxs","allowhighfees|maxfeerate"} },
     { "rawtransactions",    "decodepsbt",                   &decodepsbt,                {"psbt"} },

test/functional/rpc_signrawtransaction.py

@@ -15,7 +15,6 @@ class SignRawTransactionsTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 2
-        self.extra_args = [["-deprecatedrpc=signrawtransaction"], []]
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()