trim pytype testing blacklist (#527)

stdlib/2and3/plistlib.pyi

@@ -36,14 +36,15 @@ def readPlist(pathOrFile: Union[_Path, IO[bytes]]) -> DictT[str, Any]: ...
 def writePlist(value: Mapping[str, Any], pathOrFile: Union[_Path, IO[bytes]]) -> None: ...
 def readPlistFromBytes(data: bytes) -> DictT[str, Any]: ...
 def writePlistToBytes(value: Mapping[str, Any]) -> bytes: ...
-if sys.version_info < (3,) and sys.platform == 'darwin':
-    def readPlistFromResource(path: _Path, restype: str = ...,
-                              resid: int = ...) -> DictT[str, Any]: ...
-    def writePlistToResource(rootObject: Mapping[str, Any], path: _Path,
-                             restype: str = ...,
-                             resid: int = ...) -> None: ...
-    def readPlistFromString(data: str) -> DictT[str, Any]: ...
-    def writePlistToString(rootObject: Mapping[str, Any]) -> str: ...
+if sys.version_info < (3,):
+    if sys.platform == 'darwin':
+        def readPlistFromResource(path: _Path, restype: str = ...,
+                                  resid: int = ...) -> DictT[str, Any]: ...
+        def writePlistToResource(rootObject: Mapping[str, Any], path: _Path,
+                                 restype: str = ...,
+                                 resid: int = ...) -> None: ...
+        def readPlistFromString(data: str) -> DictT[str, Any]: ...
+        def writePlistToString(rootObject: Mapping[str, Any]) -> str: ...
 
 if sys.version_info >= (3,):
     class Dict(dict):

tests/pytype_blacklist.txt

@@ -1,18 +1,10 @@
 # Pytype blacklist. Files will not be tested with pytype.
 
 2.7/__builtin__.pyi
-2.7/StringIO.pyi
 2.7/builtins.pyi
-2.7/codecs.pyi
-2.7/inspect.pyi
-2.7/pydoc.pyi
 2.7/types.pyi
 2.7/typing.pyi
-2.7/xml/dom/minidom.pyi
 2and3/argparse.pyi
 2and3/logging/handlers.pyi
-2and3/logging/__init__.pyi
-2and3/mmap.pyi
-2and3/plistlib.pyi
 2and3/tarfile.pyi
 2and3/webbrowser.pyi