remove unxip ci osx (compiler-research#108)

Author: Vipul-Cariappa

.github/workflows/ci.yml

@@ -306,6 +306,7 @@ jobs:
       run: |
         brew update
         brew remove [email protected]
+        brew remove unxip
         # workaround for https://github.com/actions/setup-python/issues/577
         for pkg in $(brew list | grep '^python@'); do
           brew unlink "$pkg"