Declaring zmod and poly obsolete. They have problems.

diff --git a/Lib/poly.py b/Lib/lib-old/poly.py
similarity index 100%
rename from Lib/poly.py
rename to Lib/lib-old/poly.py

diff --git a/Lib/zmod.py b/Lib/lib-old/zmod.py
similarity index 100%
rename from Lib/zmod.py
rename to Lib/lib-old/zmod.py