Disable Mill libraries

GH actions don't digest them well fttb

Author: anatoliykmetyuk

community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala

@@ -344,10 +344,10 @@ class CommunityBuildTest:
   @Test def ScalaPB = projects.ScalaPB.run()
   @Test def minitest = projects.minitest.run()
   @Test def fastparse = projects.fastparse.run()
-  @Test def utest = projects.utest.run()
-  @Test def sourcecode = projects.sourcecode.run()
-  @Test def oslib = projects.oslib.run()
-  @Test def ujson = projects.ujson.run()
+  //@Test def utest = projects.utest.run()
+  //@Test def sourcecode = projects.sourcecode.run()
+  //@Test def oslib = projects.oslib.run()
+  //@Test def ujson = projects.ujson.run()
   // @Test def oslibWatch = projects.oslibWatch.run()
   @Test def stdLib213 = projects.stdLib213.run()
   @Test def shapeless = projects.shapeless.run()