cleanup
(cherry picked from commit 961501b)
Dead code: Dart module configuration
(cherry picked from commit 19ce56f)
Dead code: Dart compiler
(cherry picked from commit 8610709)
Dart debug: work with JavascriptBreakpointType even in cmd line mode
(cherry picked from commit ebf9450)
Dart: javaScriptBreakpointAware -> javaScriptBreakpointAwareFileType
(cherry picked from commit 51a6f2e)
Dead code: Dart module type
(cherry picked from commit 90f4e91)
Dead code: Dart IntelliJ plugin module
(cherry picked from commit a00388e)
Dead code: Dart SDK type
(cherry picked from commit 1d4751b)