Revert "Add UKSM 0.1.2"

This reverts commit 25822095e3f29db64dfa0dcfada4171ae20a2e6b.

Conflicts:

	Documentation/vm/00-INDEX
	Documentation/vm/uksm.txt
	include/linux/sradix-tree.h
	include/linux/uksm.h
	lib/sradix-tree.c
	mm/uksm.c