ext4: Remove fs-layer file contents en/decryption code

Now that fscrypt's file contents en/decryption is always implemented
using blk-crypto when the filesystem is block-based, the fs-layer
en/decryption code in ext4 is unused code.  Remove it.

Note that this makes possible some additional cleanups, but they're left
to later commits:

  - Making ext4_bio_write_folio() return void
  - Renaming bio_post_read_ctx to fsverity_ctx or similar, and
    allocating the pool only when fsverity support is needed

Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260713023708.9245-8-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

0 files changed, 0 insertions, 0 deletions