Remove unwanted preference pages from your RCP app

In my recent RCP app some unwanted preferences, contributed from other plugins showed up:

To remove them, just add the following code to your WorkbenchAdvisor class:

public void postStartup(){

  PreferenceManagerpm=PlatformUI.getWorkbench().getPreferenceManager();

  pm.remove( "org.eclipse.help.ui.browsersPreferencePage" ); //remove single contribution

  pm.removeAll(); //just remove all

}