fs/netfs: remove unused enum choice NETFS_READ_HOLE_CLEAR

This choice was added by commit 3a11b3a ("netfs: Pass more
information on how to deal with a hole in the cache") but the last
user was removed by commit 86b374d ("netfs: Remove
fs/netfs/io.c").

Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/20250519134813.2975312-6-dhowells@redhat.com
cc: Paulo Alcantara <pc@manguebit.com>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: MaxKellermann

include/linux/fscache.h

@@ -498,9 +498,6 @@ static inline void fscache_end_operation(struct netfs_cache_resources *cres)
  *
  *	NETFS_READ_HOLE_IGNORE - Just try to read (may return a short read).
  *
- *	NETFS_READ_HOLE_CLEAR - Seek for data, clearing the part of the buffer
- *				skipped over, then do as for IGNORE.
- *
  *	NETFS_READ_HOLE_FAIL - Give ENODATA if we encounter a hole.
  */
 static inline

include/linux/netfs.h

@@ -318,7 +318,6 @@ struct netfs_request_ops {
  */
 enum netfs_read_from_hole {
 	NETFS_READ_HOLE_IGNORE,
-	NETFS_READ_HOLE_CLEAR,
 	NETFS_READ_HOLE_FAIL,
 };