arch/um: remove duplicate includes

Signed-off-by: Lucas Woods <woodzy@gmail.com>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/um/os-Linux/sigio.c

diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c
index 7243f57..6443809 100644
--- a/arch/um/os-Linux/sigio.c
+++ b/arch/um/os-Linux/sigio.c
@@ -20,7 +20,6 @@
 #include "sigio.h"
 #include "os.h"
 #include "um_malloc.h"
-#include "init.h"
 
 /* Protected by sigio_lock(), also used by sigio_cleanup, which is an
  * exitcall.