lib/crc-t10dif: remove crc_t10dif_is_optimized()

With the "crct10dif" algorithm having been removed from the crypto API,
crc_t10dif_is_optimized() is no longer used.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250208175647.12333-1-ebiggers@kernel.org


Signed-off-by: Eric Biggers <ebiggers@google.com>