Don't use IPython.utils.warn (Deprecated).

Carreau · Carreau · commit f8b959e539c7 · 2016-07-06T11:45:23.000-07:00
And InlineBackaedConfig was renamed in 0.12 (2011): `https://github.com/ipython/ipython/pull/923` So we can likely remove the warning.
diff --git a/config.py b/config.py
@@ -13,12 +13,10 @@
 # Imports
 #-----------------------------------------------------------------------------
 
-from traitlets.config import Config
 from traitlets.config.configurable import SingletonConfigurable
 from traitlets import (
     Dict, Instance, Set, Bool, TraitError, Unicode
 )
-from IPython.utils.warn import warn
 
 #-----------------------------------------------------------------------------
 # Configurable for inline backend options
@@ -41,12 +39,6 @@ class InlineBackendConfig(SingletonConfigurable):
 class InlineBackend(InlineBackendConfig):
     """An object to store configuration of the inline backend."""
 
-    def _config_changed(self, name, old, new):
-        # warn on change of renamed config section
-        if new.InlineBackendConfig != getattr(old, 'InlineBackendConfig', Config()):
-            warn("InlineBackendConfig has been renamed to InlineBackend")
-        super(InlineBackend, self)._config_changed(name, old, new)
-
     # The typical default figure size is too large for inline use,
     # so we shrink the figure size to 6x4, and tweak fonts to
     # make that fit.
