removing checkout, since the issue appears to be the context

I'm hoping that when Melanie pushes a new change, it'll "just work". We'll seee

 * #90

.github/workflows/unicode_warn.yml

@@ -43,7 +43,6 @@ jobs:
         set -x
         git config --global --add safe.directory .
         git config --global --add safe.directory "$(pwd)"
-        git checkout ${{ github.event.pull_request.head.ref }}
         git branch -a
         git log