prereq-build: remove python 2 cleanup recipe

This reverts commit 3b68fb57c9.

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 e2f9fa4204)

include/prereq.mk

@@ -77,18 +77,6 @@ define RequireCHeader
   $$(eval $$(call Require,$(1),$(2)))
 endef
 
-define CleanupPython2
-  define Require/python2-cleanup
-	if [ -f "$(STAGING_DIR_HOST)/bin/python" ] && \
-		$(STAGING_DIR_HOST)/bin/python -V 2>&1 | \
-		grep -q 'Python 2'; then \
-			rm $(STAGING_DIR_HOST)/bin/python; \
-	fi
-  endef
-
-  $$(eval $$(call Require,python2-cleanup))
-endef
-
 define QuoteHostCommand
 '$(subst ','"'"',$(strip $(1)))'
 endef