remove dead + duplicate python code

common/cython_hacks.py

@@ -1,23 +0,0 @@
-import os
-import sysconfig
-from Cython.Distutils import build_ext
-
-def get_ext_filename_without_platform_suffix(filename):
-  name, ext = os.path.splitext(filename)
-  ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')
-
-  if ext_suffix == ext:
-    return filename
-
-  ext_suffix = ext_suffix.replace(ext, '')
-  idx = name.find(ext_suffix)
-
-  if idx == -1:
-    return filename
-  else:
-    return name[:idx] + ext
-
-class BuildExtWithoutPlatformSuffix(build_ext):
-  def get_ext_filename(self, ext_name):
-    filename = super().get_ext_filename(ext_name)
-    return get_ext_filename_without_platform_suffix(filename)

release/files_common

@@ -36,7 +36,6 @@ common/filter_simple.py
 common/stat_live.py
 common/spinner.py
 common/text_window.py
-common/cython_hacks.py
 common/SConscript
 
 common/kalman/.gitignore

tools/lib/lazy_property.py

@@ -1,12 +0,0 @@
-class lazy_property(object):
-  """Defines a property whose value will be computed only once and as needed.
-
-     This can only be used on instance methods.
-  """
-  def __init__(self, func):
-    self._func = func
-
-  def __get__(self, obj_self, cls):
-    value = self._func(obj_self)
-    setattr(obj_self, self._func.__name__, value)
-    return value