Remove a couple unnecessary barriers

src/hb-ot-os2-table.hh

@@ -336,9 +336,9 @@ struct OS2
     TRACE_SANITIZE (this);
     if (unlikely (!c->check_struct (this))) return_trace (false);
     hb_barrier ();
-    if (unlikely (version >= 1 && hb_barrier () && !v1X.sanitize (c))) return_trace (false);
-    if (unlikely (version >= 2 && hb_barrier () && !v2X.sanitize (c))) return_trace (false);
-    if (unlikely (version >= 5 && hb_barrier () && !v5X.sanitize (c))) return_trace (false);
+    if (unlikely (version >= 1 && !v1X.sanitize (c))) return_trace (false);
+    if (unlikely (version >= 2 && !v2X.sanitize (c))) return_trace (false);
+    if (unlikely (version >= 5 && !v5X.sanitize (c))) return_trace (false);
     return_trace (true);
   }
 

src/hb-ot-post-table.hh

@@ -301,7 +301,7 @@ struct post
     return_trace (c->check_struct (this) &&
 		  hb_barrier () &&
 		  (version.to_int () == 0x00010000 ||
-		   (version.to_int () == 0x00020000 && hb_barrier () && v2X.sanitize (c)) ||
+		   (version.to_int () == 0x00020000 && v2X.sanitize (c)) ||
 		   version.to_int () == 0x00030000));
   }