Revert "Merge branch 'master' of github.com:chapel-lang/chapel into release/1.10"

This reverts commit c0e2bc1a8d085850fadf7413df9d741e7ec37906, reversing
changes made to 01ddd35db64662675f202c964fbeb4d5a4c35621.

This reverts the merge of master into the release/1.10 branch. We want to keep
that branch in the state it was for the release.