9044522ef7 Drop JSONRPCRequest constructors after #21366 (Russell Yanofsky)
Pull request description:
This just makes an additional simplification after #21366 replaced
util::Ref with std::any. It was originally suggested
https://github.com/bitcoin/bitcoin/pull/21366#issuecomment-792044351 but
delayed for a followup. It would have prevented usage bug
https://github.com/bitcoin/bitcoin/pull/21572.
ACKs for top commit:
promag:
ACK 9044522ef7, fixed conflict in src/wallet/interfaces.cpp.
Tree-SHA512: e909411b8f75013620b94e1a609296befb832fdcb574cd2e6689bfe3c636b03cd4ac1ccb2b32b532daf0f2131bb043464024966310fffc7e3cad77713d4bd0ef