Use asottile.cached_property.

pre_commit/util.py

@@ -6,23 +6,6 @@ import shutil
 import sys
 
 
-class cached_property(object):
-    """Like @property, but caches the value."""
-
-    def __init__(self, func):
-        self.__name__ = func.__name__
-        self.__module__ = func.__module__
-        self.__doc__ = func.__doc__
-        self._func = func
-
-    def __get__(self, obj, cls):
-        if obj is None:
-            return self
-        value = self._func(obj)
-        obj.__dict__[self.__name__] = value
-        return value
-
-
 def memoize_by_cwd(func):
     """Memoize a function call based on os.getcwd()."""
     @functools.wraps(func)