Revert "[utils] Work around PyPy stupidity with Windows DLLs (Fixes #4392)"

This reverts commit 16040f46d6.

youtube_dl/compat.py

@@ -1,10 +1,8 @@
 from __future__ import unicode_literals
 
-import ctypes
 import getpass
 import optparse
 import os
-import platform
 import re
 import subprocess
 import sys
@@ -328,22 +326,6 @@ def workaround_optparse_bug9161():
         optparse.OptionGroup.add_option = _compat_add_option
 
 
-if platform.python_implementation() == 'PyPy':
-    # PyPy expects byte strings as Windows function names
-    # https://github.com/rg3/youtube-dl/pull/4392
-    def compat_WINFUNCTYPE(*args, **kwargs):
-        real = ctypes.WINFUNCTYPE(*args, **kwargs)
-
-        def resf(tpl, *args, **kwargs):
-            funcname, dll = tpl
-            return real((str(funcname), dll), *args, **kwargs)
-
-        return resf
-else:
-    def compat_WINFUNCTYPE(*args, **kwargs):
-        return ctypes.WINFUNCTYPE(*args, **kwargs)
-
-
 __all__ = [
     'compat_HTTPError',
     'compat_chr',
@@ -367,7 +349,6 @@ __all__ = [
     'compat_urllib_request',
     'compat_urlparse',
     'compat_urlretrieve',
-    'compat_WINFUNCTYPE',
     'compat_xml_parse_error',
     'shlex_quote',
     'subprocess_check_output',