Revert "add support for [skip **]"
Revert "add support for [skip **]"

This reverts commit e771691ad00167a17e0e0b0e4803a1886de27d04.

looks like it is already supported now
https://github.blog/changelog/2021-02-08-github-actions-skip-pull-request-and-push-workflows-with-skip-ci/

harfbuzz/uharfbuzz,harfbuzz/uharfbuzz