crypto: x86/poly1305 - Remove assignments with no effect

This patch removes a few ineffectual assignments from the function
crypto_poly1305_setdctxkey.

Reported-by: kernel test robot <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

arch/x86/crypto/poly1305_glue.c

···
 			dctx->s[1] = get_unaligned_le32(&inp[4]);
 			dctx->s[2] = get_unaligned_le32(&inp[8]);
 			dctx->s[3] = get_unaligned_le32(&inp[12]);
-			inp += POLY1305_BLOCK_SIZE;
-			len -= POLY1305_BLOCK_SIZE;
-			acc += POLY1305_BLOCK_SIZE;
 			dctx->sset = true;
 		}
 	}