crypto: x86/aes - remove unused file aes_glue.c

Commit 1d2c3279 ("crypto: x86/aes - drop scalar assembler
implementations") was meant to remove aes_glue.c, but it actually left
it as an unused one-line file.  Remove this unused file.

Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>