kmemleak: Remove the kmemleak.h include in drivers/char/vt.c

This file is no longer annotated for false positives but the kmemleak.h
include was still present.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Alan Cox <alan.cox@linux.intel.com>

drivers/char/vt.c

@@ -103,7 +103,6 @@
 #include <linux/io.h>
 #include <asm/system.h>
 #include <linux/uaccess.h>
-#include <linux/kmemleak.h>
 
 #define MAX_NR_CON_DRIVER 16