[PATCH] Dead code in i386/kernel/process.c

This patch removes an artifact of code left over from the 2.0 days when
the kernel didn't use flat segments.

The preceding memcpy() already takes care of the NULL ptr mapping.

arch/i386/kernel/process.c

@@ -313,11 +313,6 @@ void machine_real_restart(unsigned char *code, int length)
 	memcpy (swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
 		sizeof (swapper_pg_dir [0]) * KERNEL_PGD_PTRS);
 
-	/* Make sure the first page is mapped to the start of physical memory.
-	   It is normally not mapped, to trap kernel NULL pointer dereferences. */
-
-	pg0[0] = _PAGE_RW | _PAGE_PRESENT;
-
 	/*
 	 * Use `swapper_pg_dir' as our page directory.
 	 */