Remove unxip ci osx (#348)

Author: mcbarton

.github/workflows/ci.yml

@@ -310,6 +310,7 @@ 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"
@@ -763,6 +764,7 @@ jobs:
       run: |
         brew update
         brew remove [email protected]
+        brew remove unxip
         export ARCHITECHURE=$(uname -m)
         if [[ "$ARCHITECHURE" == "x86_64" ]]; then
           brew remove swiftlint