Remove shim marked for removal.

IPython/__init__.py

@@ -144,14 +144,3 b' def start_kernel(argv=None, **kwargs):'
     from IPython.kernel.zmq.kernelapp import launch_new_instance
     return launch_new_instance(argv=argv, **kwargs)
     
-# deprecated shim for IPython.Config
-import traitlets.config
-class Config(traitlets.config.Config):
-    def __init__(self, *args, **kwargs):
-        warnings.warn(
-            "IPython.Config is deprecated and will be removed in IPython 5."
-            " Use traitlets.config.Config.",
-            DeprecationWarning, stacklevel=2,
-        )
-        super(Config, self).__init__(*args, **kwargs)
-