* objc/objc-act.c (lang_init, finish_file, maybe_objc_comptypes,
        maybe_objc_check_decl, build_objc_string_object,
        objc_declare_alias, objc_declare_class, build_message_expr,
        build_protocol_expr, build_selector_expr, build_encode_expr,
        get_class_ivars, start_class, start_protocol): Remove
        redundant code, assuming doing_objc_thang is true.

From-SVN: r37866