Revert "Configure Cirrus Branch Guard (#2492)" (#2496)
Revert "Configure Cirrus Branch Guard (#2492)" (#2496)

This reverts commit bc69693ef0ad08059b8884cab5ace1877837b9ab.
flutter/plugins,flutter/plugins,tvolkert/plugins,tvolkert/plugins,flutter/plugins,flutter/plugins,mehmetf/plugins,flutter/plugins,tvolkert/plugins,mehmetf/plugins,mehmetf/plugins,flutter/plugins,flutter/plugins,tvolkert/plugins,flutter/plugins,mehmetf/plugins,mehmetf/plugins