Revert "Update rpcmining.cpp"

This reverts commit 158e9ffcaa05c65032dbc704838058f4e8f5ae7b.
Revert "Update bitcoinrpc.h"

This reverts commit d38519e1530bd53d329b0545e76bccb6261acac4.
Revert "Update bitcoinrpc.cpp"

This reverts commit 1a35757ef1bc6bc0b1497bdabb9fe3e4dd63dfcb.
Revert "Update rpcmining.cpp"

This reverts commit 2f514f40671730fa99700fe532fd4166abef0a7a.