Revert "Set MAX_PARALLEL_NUMBER to 1"
Revert "Set MAX_PARALLEL_NUMBER to 1"

This reverts commit 97bc85fdc2af0deef822e86d8e7ed13c4e418bb5.

explosion/thinc,explosion/thinc,spacy-io/thinc,explosion/thinc,spacy-io/thinc,explosion/thinc,spacy-io/thinc