Remove unnecessary function prototypes

Author: codablock

src/wallet/rpcwallet.cpp

@@ -2699,9 +2699,7 @@ extern UniValue removeprunedfunds(const JSONRPCRequest& request);
 extern UniValue dumphdinfo(const JSONRPCRequest& request);
 extern UniValue importelectrumwallet(const JSONRPCRequest& request);
 
-extern UniValue instantsendtoaddress(const UniValue& params, bool fHelp);
-extern UniValue privatesend(const UniValue& params, bool fHelp);
-extern UniValue keepass(const UniValue& params, bool fHelp);
+extern UniValue privatesend(const JSONRPCRequest& request);
 
 static const CRPCCommand commands[] =
 { //  category              name                        actor (function)           okSafeMode