refactor: Remove g_rpc_node global

This commit does not change behavior

src/init.cpp

@@ -1339,7 +1339,6 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
     for (const auto& client : node.chain_clients) {
         client->registerRpcs();
     }
-    g_rpc_node = &node;
 #if ENABLE_ZMQ
     RegisterZMQRPCCommands(tableRPC);
 #endif

src/rpc/blockchain.cpp

@@ -2394,5 +2394,3 @@ static const CRPCCommand commands[] =
     for (unsigned int vcidx = 0; vcidx < ARRAYLEN(commands); vcidx++)
         t.appendCommand(commands[vcidx].name, &commands[vcidx]);
 }
-
-NodeContext* g_rpc_node = nullptr;

src/rpc/blockchain.h

@@ -50,11 +50,6 @@ UniValue blockheaderToJSON(const CBlockIndex* tip, const CBlockIndex* blockindex
 /** Used by getblockstats to get feerates at different percentiles by weight  */
 void CalculatePercentilesByWeight(CAmount result[NUM_GETBLOCKSTATS_PERCENTILES], std::vector<std::pair<CAmount, int64_t>>& scores, int64_t total_weight);
 
-//! Pointer to node state that needs to be declared as a global to be accessible
-//! RPC methods. Due to limitations of the RPC framework, there's currently no
-//! direct way to pass in state to RPC methods without globals.
-extern NodeContext* g_rpc_node;
-
 NodeContext& EnsureNodeContext(const util::Ref& context);
 CTxMemPool& EnsureMemPool(const util::Ref& context);
 

src/test/util/setup_common.cpp

@@ -123,7 +123,6 @@ TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const
     const CChainParams& chainparams = Params();
     // Ideally we'd move all the RPC tests to the functional testing framework
     // instead of unit tests, but for now we need these here.
-    g_rpc_node = &m_node;
     RegisterAllCoreRPCCommands(tableRPC);
 
     m_node.scheduler = MakeUnique<CScheduler>();
@@ -176,7 +175,6 @@ TestingSetup::~TestingSetup()
     threadGroup.join_all();
     GetMainSignals().FlushBackgroundCallbacks();
     GetMainSignals().UnregisterBackgroundSignalScheduler();
-    g_rpc_node = nullptr;
     m_node.connman.reset();
     m_node.banman.reset();
     m_node.args = nullptr;