Unskip tests in test_platform

Lib/test/test_platform.py

@@ -220,7 +220,6 @@ class PlatformTest(unittest.TestCase):
     def test_win32_ver(self):
         res = platform.win32_ver()
 
-    @unittest.skip("TODO: RUSTPYTHON, NameError: name 'ParserCreate' is not defined")
     def test_mac_ver(self):
         res = platform.mac_ver()
 
@@ -254,7 +253,8 @@ class PlatformTest(unittest.TestCase):
                 self.assertEqual(res[2], 'PowerPC')
 
 
-    @unittest.skip("TODO: RUSTPYTHON, AttributeError: module 'os' has no attribute 'fork'")
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
     @unittest.skipUnless(sys.platform == 'darwin', "OSX only test")
     def test_mac_ver_with_fork(self):
         # Issue7895: platform.mac_ver() crashes when using fork without exec
@@ -273,8 +273,6 @@ class PlatformTest(unittest.TestCase):
             self.assertEqual(cpid, pid)
             self.assertEqual(sts, 0)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_libc_ver(self):
         # check that libc_ver(executable) doesn't raise an exception
         if os.path.isdir(sys.executable) and \