mm/mprotect: remove the redundant initialization for error

The variable error will be assigned correctly before it is used, the
initialization is redundant, so remove it.

Link: https://lkml.kernel.org/r/20220704114112.163112-1-xiujianfeng@huawei.com
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/mprotect.c

@@ -663,7 +663,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
 {
 	unsigned long nstart, end, tmp, reqprot;
 	struct vm_area_struct *vma, *prev;
-	int error = -EINVAL;
+	int error;
 	const int grows = prot & (PROT_GROWSDOWN|PROT_GROWSUP);
 	const bool rier = (current->personality & READ_IMPLIES_EXEC) &&
 				(prot & PROT_READ);