Revert "Enable upstream's Poly1305 code."

This reverts commit 6f0c4db90e47437ed87a2d385c7797e692a2cf65 except for the
imported assembly files, which are left as-is but unused. Until upstream fixes
https://rt.openssl.org/Ticket/Display.html?id=4483, we shouldn't ship this
code. Once that bug has been fixed, we'll restore it.

Change-Id: I74aea18ce31a4b79657d04f8589c18d6b17f1578
Reviewed-on: https://boringssl-review.googlesource.com/7602
Reviewed-by: Emily Stark (Dunn) <estark@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/include/openssl/poly1305.h b/include/openssl/poly1305.h
index d42d6ce..b4e23e2 100644
--- a/include/openssl/poly1305.h
+++ b/include/openssl/poly1305.h
@@ -22,10 +22,7 @@
 #endif
 
 
-typedef union {
-  double align;
-  uint8_t bytes[512];
-} poly1305_state;
+typedef uint8_t poly1305_state[512];
 
 /* CRYPTO_poly1305_init sets up |state| so that it can be used to calculate an
  * authentication tag with the one-time key |key|. Note that |key| is a