remove useless directive.
remove useless directive.

repos-bitcoin/bitc,Methimpact/bitc,repos-bitcoin/bitc,Methimpact/bitc,bit-c/bitc,bit-c/bitc,bit-c/bitc,jma127/bitc-rpc,dxtr/bitc,Methimpact/bitc,jma127/bitc-rpc,repos-bitcoin/bitc,jma127/bitc-rpc,dxtr/bitc,dxtr/bitc