[release-1.4] Cirrus: Drop OSX task

Ref: https://github.com/containers/skopeo/pull/1850

Signed-off-by: Chris Evich <cevich@redhat.com>

.cirrus.yml

@@ -83,30 +83,10 @@ doccheck_task:
       "${SKOPEO_PATH}/${SCRIPT_BASE}/runner.sh" build
       "${SKOPEO_PATH}/${SCRIPT_BASE}/runner.sh" doccheck
 
-osx_task:
-    only_if: &not_docs $CIRRUS_CHANGE_TITLE !=~ '.*CI:DOCS.*'
-    depends_on:
-        - validate
-    macos_instance:
-        image: catalina-xcode
-    setup_script: |
-        # /usr/local/opt/go@1.16 will be populated by (brew install go@1.16) below
-        export PATH=$GOPATH/bin:/usr/local/opt/go@1.16/bin:$PATH
-        brew update
-        brew install gpgme go@1.16 go-md2man
-        go get -u golang.org/x/lint/golint
-    test_script: |
-        export PATH=$GOPATH/bin:/usr/local/opt/go@1.16/bin:$PATH
-        go version
-        go env
-        make validate-local test-unit-local bin/skopeo
-        sudo make install
-        /usr/local/bin/skopeo -v
-
 
 cross_task:
     alias: cross
-    only_if: *not_docs
+    only_if: &not_docs $CIRRUS_CHANGE_TITLE !=~ '.*CI:DOCS.*'
     depends_on:
         - validate
     gce_instance:
@@ -202,7 +182,6 @@ success_task:
     depends_on:
         - validate
         - doccheck
-        - osx
         - cross
         - test_skopeo
         - meta