Disable the test for missing metadata.

Author: jaraco

Lib/test/test_importlib/metadata/test_main.py

@@ -157,6 +157,7 @@ def test_valid_dists_preferred(self):
         dist = Distribution.from_name('foo')
         assert dist.version == "1.0"
 
+    @unittest.skip("Functionality disabled")
     def test_missing_metadata(self):
         """
         Dists with a missing metadata file should return None.