Revert "Add ignoring not having windll to mypy"

This reverts commit 55c7fcfd61e0391287e2717117da4fca03b77dec.

requirements.txt

@@ -2,7 +2,7 @@
 pytest==4.2.0
 pytest-asyncio==0.10.0
 pytest-mock==1.10.3
-pytest-mypy==0.3.2
+pytest-mypy==0.4.1
 pytest-flakes==4.0.0
 # because of pip bug https://github.com/pypa/pip/issues/4780
 aiohttp==3.5.4

src/galaxy/__init__.py

@@ -1 +1 @@
-__path__: str = __import__('pkgutil').extend_path(__path__, __name__)
+__path__: str = __import__('pkgutil').extend_path(__path__, __name__) # type: ignore

src/galaxy/registry_monitor.py

@@ -1,5 +1,5 @@
-import platform
-if platform.system().lower() == "windows":
+import sys
+if sys.platform == "win32":
     import logging
     import ctypes
     from ctypes.wintypes import LONG, HKEY, LPCWSTR, DWORD, BOOL, HANDLE, LPVOID