Deprecate ihooks for removal in 3.0.
diff --git a/Doc/library/undoc.rst b/Doc/library/undoc.rst
index 856cf86..deff5e2 100644
--- a/Doc/library/undoc.rst
+++ b/Doc/library/undoc.rst
@@ -21,6 +21,8 @@
 
 :mod:`ihooks`
    --- Import hook support (for :mod:`rexec`; may become obsolete).
+   
+   .. warning:: The ihooks module has been removed in Python 3.0.
 
 
 Platform specific modules