Delete the variants/draft code.

Change-Id: I84abfedc30e4c34e42285f3c366c2f504a3b9cf2
Reviewed-on: https://boringssl-review.googlesource.com/c/34144
Commit-Queue: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/ssl/tls13_client.cc b/ssl/tls13_client.cc
index e7d6dae..ac97165 100644
--- a/ssl/tls13_client.cc
+++ b/ssl/tls13_client.cc
@@ -294,16 +294,14 @@
     return ssl_hs_error;
   }
 
-  if (ssl_is_draft28(ssl->version)) {
-    // Recheck supported_versions, in case this is the second ServerHello.
-    uint16_t version;
-    if (!have_supported_versions ||
-        !CBS_get_u16(&supported_versions, &version) ||
-        version != ssl->version) {
-      OPENSSL_PUT_ERROR(SSL, SSL_R_SECOND_SERVERHELLO_VERSION_MISMATCH);
-      ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
-      return ssl_hs_error;
-    }
+  // Recheck supported_versions, in case this is the second ServerHello.
+  uint16_t version;
+  if (!have_supported_versions ||
+      !CBS_get_u16(&supported_versions, &version) ||
+      version != ssl->version) {
+    OPENSSL_PUT_ERROR(SSL, SSL_R_SECOND_SERVERHELLO_VERSION_MISMATCH);
+    ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
+    return ssl_hs_error;
   }
 
   alert = SSL_AD_DECODE_ERROR;