prereq-build: remove python 2 cleanup recipe

This reverts commit 3b68fb57.

After refactoring build checks to update old symlinks,
and after a long time of no python 2 support,
this is no longer needed.

Signed-off-by: Michael Pratt <mcpratt@pm.me>
(cherry picked from commit e2f9fa42044a2660f702a9b51b14cbde24a13702)