Disable GitLab unit tests for Python3.8, macOS, non-minimal wheel (#3304

)

.gitlab-ci.yml

@@ -611,23 +611,27 @@ test_python_mac_python37_10_14_minimal:
     paths:
       - pytest.*
 
-test_python_mac_python38_10_15:
-  tags:
-    - macos10.15
-  only:
-    variables:
-      - $TC_HAS_MACOS_RUNNERS == "1"
-  stage: test
-  dependencies:
-    - build_wheel_mac_10_15_python38
-  script:
-    - export VIRTUALENV="/Library/Frameworks/Python.framework/Versions/3.8/bin/virtualenv"
-    - bash -e scripts/test_wheel.sh
-  artifacts:
-    when: always
-    expire_in: 2 weeks
-    paths:
-      - pytest.*
+# Core ML Tool currently has only beta support for Python 3.8.
+# We can't currently rely on it as part of our CI.
+# See GitHub issue:
+#    https://github.com/apple/coremltools/issues/372
+#test_python_mac_python38_10_15:
+#  tags:
+#    - macos10.15
+#  only:
+#    variables:
+#      - $TC_HAS_MACOS_RUNNERS == "1"
+#  stage: test
+#  dependencies:
+#    - build_wheel_mac_10_15_python38
+#  script:
+#    - export VIRTUALENV="/Library/Frameworks/Python.framework/Versions/3.8/bin/virtualenv"
+#    - bash -e scripts/test_wheel.sh
+#  artifacts:
+#    when: always
+#    expire_in: 2 weeks
+#    paths:
+#      - pytest.*
 
 test_python_mac_python38_10_14_minimal:
   tags: