Remove tls_record_type_t.

The various key schedule cleanups have removed the need for this enum.

Change-Id: I3269aa19b834815926ad56b2d919e21b5e2603fe
Reviewed-on: https://boringssl-review.googlesource.com/12582
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/ssl/internal.h b/ssl/internal.h
index 1c72d04..fe3d610 100644
--- a/ssl/internal.h
+++ b/ssl/internal.h
@@ -811,13 +811,6 @@
  * zero. */
 int tls13_get_context_hash(SSL *ssl, uint8_t *out, size_t *out_len);
 
-enum tls_record_type_t {
-  type_early_handshake,
-  type_early_data,
-  type_handshake,
-  type_data,
-};
-
 /* tls13_set_traffic_key sets the read or write traffic keys to
  * |traffic_secret|. It returns one on success and zero on error. */
 int tls13_set_traffic_key(SSL *ssl, enum evp_aead_direction_t direction,