Clean up duplicate includes in Documentation/

This patch cleans up duplicate includes in
	Documentation/
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Acked-by: NBalbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Documentation/accounting/getdelays.c

@@ -21,7 +21,6 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/socket.h>
-#include <sys/types.h>
 #include <signal.h>
 
 #include <linux/genetlink.h>