Remove duplicated comment

Author: strager

plugin/vscode/empty.cpp

@@ -4,12 +4,6 @@
 // This file is intentionally empty. It is needed to make CMake's add_library
 // function happy.
 
-// Copyright (C) 2020  Matthew Glazar
-// See end of file for extended copyright information.
-
-// Copyright (C) 2020  Matthew Glazar
-// See end of file for extended copyright information.
-
 // quick-lint-js finds bugs in JavaScript programs.
 // Copyright (C) 2020  Matthew Glazar
 //