This patch removes a group of unused bh functions in um.  This 2.2 legacy
code should be cleaned up.
Signed-off-by: Coywolf Qi Hunt <coywolf@greatcn.org>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>