remove unused util, closes pandas-dev#19676

Author: jbrockmendel

pandas/util/_decorators.py

@@ -1,7 +1,6 @@
 from pandas.compat import callable, signature, PY2
 from pandas._libs.properties import cache_readonly  # noqa
 import inspect
-import types
 import warnings
 from textwrap import dedent, wrap
 from functools import wraps, update_wrapper, WRAPPER_ASSIGNMENTS
@@ -339,48 +338,3 @@ def make_signature(func):
     if spec.keywords:
         args.append('**' + spec.keywords)
     return args, spec.args
-
-
-class docstring_wrapper(object):
-    """
-    Decorator to wrap a function and provide
-    a dynamically evaluated doc-string.
-
-    Parameters
-    ----------
-    func : callable
-    creator : callable
-        return the doc-string
-    default : str, optional
-        return this doc-string on error
-    """
-    _attrs = ['__module__', '__name__',
-              '__qualname__', '__annotations__']
-
-    def __init__(self, func, creator, default=None):
-        self.func = func
-        self.creator = creator
-        self.default = default
-        update_wrapper(
-            self, func, [attr for attr in self._attrs
-                         if hasattr(func, attr)])
-
-    def __get__(self, instance, cls=None):
-
-        # we are called with a class
-        if instance is None:
-            return self
-
-        # we want to return the actual passed instance
-        return types.MethodType(self, instance)
-
-    def __call__(self, *args, **kwargs):
-        return self.func(*args, **kwargs)
-
-    @property
-    def __doc__(self):
-        try:
-            return self.creator()
-        except Exception as exc:
-            msg = self.default or str(exc)
-            return msg