Revert "signmessagewithkey rpc"
Revert "signmessagewithkey rpc"

This reverts commit 16f4719e35d50e2f775308ae33ba857f875cf48e [formerly 34081ba5aaf1b080a7f20eebefa00df5316adb62].


Former-commit-id: e8696b71c1dcad753744b4eca38750ca9f1b8357
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin