Remove unnecessary extern C block from _dispatcher
Remove unnecessary extern C block from _dispatcher

numba/numba,stonebig/numba,gmarkall/numba,stonebig/numba,cpcloud/numba,seibert/numba,cpcloud/numba,IntelLabs/numba,stuartarchibald/numba,seibert/numba,stonebig/numba,seibert/numba,stonebig/numba,IntelLabs/numba,gmarkall/numba,numba/numba,IntelLabs/numba,seibert/numba,gmarkall/numba,numba/numba,gmarkall/numba,stonebig/numba,gmarkall/numba,numba/numba,numba/numba,stuartarchibald/numba,cpcloud/numba,stuartarchibald/numba,stuartarchibald/numba,seibert/numba,IntelLabs/numba,stuartarchibald/numba,cpcloud/numba,IntelLabs/numba,cpcloud/numba