Remove strict-virtual-specifiers option, since it's enabled everywhere.

tools/clang/plugins/Options.h

Index: tools/clang/plugins/Options.h
diff --git a/tools/clang/plugins/Options.h b/tools/clang/plugins/Options.h
index 5ef497731555544ed063380b65b6a5926e5f3f85..112ec1054fde3d0e5cca9c870cb1959fc7251321 100644
--- a/tools/clang/plugins/Options.h
+++ b/tools/clang/plugins/Options.h
@@ -11,13 +11,11 @@ struct Options {
   Options()
       : check_base_classes(false),
         check_enum_last_value(false),
-        strict_virtual_specifiers(false),
         with_ast_visitor(false),
         check_templates(false) {}
 
   bool check_base_classes;
   bool check_enum_last_value;
-  bool strict_virtual_specifiers;
   bool with_ast_visitor;
   bool check_templates;
 };