Remove bundled Itpl module.

IPython/quarantine/ipy_editors.py

@@ -9,6 +9,8 b' from IPython.core import ipapi'
 from IPython.core.error import TryNext
 ip = ipapi.get()
 
+# We no longer bundle Itpl. If you update this module, you should use advanced
+# string formatting instead.
 from IPython.external.Itpl import itplns
 import os
 

IPython/quarantine/ipy_render.py

@@ -7,6 +7,8 b' ip = ipapi.get()'
 from string import Template
 import sys,os
 
+# We no longer bundle Itpl. If you update this module, you should use advanced
+# string formatting instead.
 from IPython.external.Itpl import itplns
 
 def toclip_w32(s):