fuse: remove the unneeded result variable

Return the value fuse_dev_release() directly instead of storing it in
another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

fs/fuse/cuse.c

@@ -545,7 +545,6 @@ static int cuse_channel_release(struct inode *inode, struct file *file)
 {
 	struct fuse_dev *fud = file->private_data;
 	struct cuse_conn *cc = fc_to_cc(fud->fc);
-	int rc;
 
 	/* remove from the conntbl, no more access from this point on */
 	mutex_lock(&cuse_lock);
@@ -560,9 +559,7 @@ static int cuse_channel_release(struct inode *inode, struct file *file)
 		cdev_del(cc->cdev);
 	}
 
-	rc = fuse_dev_release(inode, file);	/* puts the base reference */
-
-	return rc;
+	return fuse_dev_release(inode, file);
 }
 
 static struct file_operations cuse_channel_fops; /* initialized during init */