netfs: Remove unused declaration netfs_queue_write_request()

Commit c245868 ("netfs: Remove the old writeback code") removed
the implementation but leave declaration.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/20250723122329.923223-1-yuehaibing@huawei.com
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: Yue Haibing

include/linux/netfs.h

@@ -443,7 +443,6 @@ size_t netfs_limit_iter(const struct iov_iter *iter, size_t start_offset,
 			size_t max_size, size_t max_segs);
 void netfs_prepare_write_failed(struct netfs_io_subrequest *subreq);
 void netfs_write_subrequest_terminated(void *_op, ssize_t transferred_or_error);
-void netfs_queue_write_request(struct netfs_io_subrequest *subreq);
 
 int netfs_start_io_read(struct inode *inode);
 void netfs_end_io_read(struct inode *inode);