remove unnecessary LOCK(cs_main)

Author: dcousens

src/rpc/blockchain.cpp

@@ -289,8 +289,6 @@ UniValue getrawmempool(const UniValue& params, bool fHelp)
             + HelpExampleRpc("getrawmempool", "true")
         );
 
-    LOCK(cs_main);
-
     bool fVerbose = false;
     if (params.size() > 0)
         fVerbose = params[0].get_bool();