Remove Deprecation Warning, add since when things were deprecated.

IPython/consoleapp.py

@@ -1,12 +1,12 b''
 """
 Shim to maintain backwards compatibility with old IPython.consoleapp imports.
 """
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 from warnings import warn
 
-warn("The `IPython.consoleapp` package has been deprecated. "
-     "You should import from jupyter_client.consoleapp instead.", DeprecationWarning, stacklevel=2)
+warn("The `IPython.consoleapp` package has been deprecated since IPython 4.0."
+     "You should import from jupyter_client.consoleapp instead.", stacklevel=2)
 
 from jupyter_client.consoleapp import *