crypto: lib - remove __HAVE_ARCH_CRYPTO_MEMNEQ

No architecture actually defines this, so it's unneeded.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

lib/crypto/memneq.c

@@ -63,8 +63,6 @@
 #include <crypto/algapi.h>
 #include <linux/module.h>
 
-#ifndef __HAVE_ARCH_CRYPTO_MEMNEQ
-
 /* Generic path for arbitrary size */
 static inline unsigned long
 __crypto_memneq_generic(const void *a, const void *b, size_t size)
@@ -173,5 +171,3 @@ noinline unsigned long __crypto_memneq(const void *a, const void *b,
 	}
 }
 EXPORT_SYMBOL(__crypto_memneq);
-
-#endif /* __HAVE_ARCH_CRYPTO_MEMNEQ */