Unbreak argmax parallelism.
Unbreak argmax parallelism.

stuartarchibald/numba,cpcloud/numba,seibert/numba,seibert/numba,IntelLabs/numba,numba/numba,IntelLabs/numba,cpcloud/numba,IntelLabs/numba,numba/numba,seibert/numba,stuartarchibald/numba,IntelLabs/numba,stuartarchibald/numba,numba/numba,numba/numba,cpcloud/numba,stuartarchibald/numba,cpcloud/numba,IntelLabs/numba,cpcloud/numba,numba/numba,stuartarchibald/numba,seibert/numba,seibert/numba