lib: remove redundant assignment to variable ret

The variable ret is being assigned a value that is never read.  If the
for-loop is entered then ret is immediately re-assigned a new value.  If
the for-loop is not executed ret is never read.  The assignment is
redundant and can be removed.

Link: https://lkml.kernel.org/r/20211230134557.83633-1-colin.i.king@gmail.com
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: ColinIanKing

lib/asn1_encoder.c

@@ -164,8 +164,6 @@ asn1_encode_oid(unsigned char *data, const unsigned char *end_data,
 
 	data_len -= 3;
 
-	ret = 0;
-
 	for (i = 2; i < oid_len; i++) {
 		ret = asn1_encode_oid_digit(&d, &data_len, oid[i]);
 		if (ret < 0)