Partially revert "Fix running of setup.py test with recent setuptools. (

#84)"

This partially reverts commit be920ea.

Fixes #320

setup.py

@@ -117,25 +117,13 @@ class uvloop_build_ext(build_ext):
  ]
 
  def initialize_options(self):
- # initialize_options() may be called multiple times on the
- # same command object, so make sure not to override previously
- # set options.
- if getattr(self, '_initialized', False):
- return
-
  super().initialize_options()
  self.use_system_libuv = False
  self.cython_always = False
  self.cython_annotate = None
  self.cython_directives = None
 
  def finalize_options(self):
- # finalize_options() may be called multiple times on the
- # same command object, so make sure not to override previously
- # set options.
- if getattr(self, '_initialized', False):
- return
-
  need_cythonize = self.cython_always
  cfiles = {}
 
@@ -195,8 +183,6 @@ def finalize_options(self):
 
  super().finalize_options()
 
- self._initialized = True
-
  def build_libuv(self):
  env = _libuv_build_env()