splice: Remove redundant assignment to ret

The variable ret belongs to redundant assignment and can be deleted.

fs/splice.c:940:2: warning: Value stored to 'ret' is never read.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4406
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>

fs/splice.c

@@ -937,7 +937,6 @@ ssize_t splice_direct_to_actor(struct file *in, struct splice_desc *sd,
 	/*
 	 * Do the splice.
 	 */
-	ret = 0;
 	bytes = 0;
 	len = sd->total_len;
 	flags = sd->flags;