IDs used for Preferences menu item removal
You can remove Search Results view buttons by using the related IDs in the trace log.
IDs for the options in the Preferences menu are listed in the 
		Processing [preferences] from [ixiasoft.eclipse.startup]
			section of the trace
			log.Processing [preferences] from [ixiasoft.eclipse.startup]
	com.ixiasoft.dita.eclipse.gui.preferences.DitaPreferencesPage ..................: 
		com.ixiasoft.dita.eclipse.gui.preferences.SynchronizationPreferencesPage ..: 
		com.ixiasoft.dita.eclipse.gui.preferences.behaviorPage ....................: 
		com.ixiasoft.dita.eclipse.gui.preferences.importexport ....................: 
	org.eclipse.ant.ui.AntPreferencePage ...........................................: 
		org.eclipse.ant.ui.AntRuntimePreferencePage ...............................: 
		org.eclipse.ant.ui.AntEditorPreferencePage ................................: 
To remove an option from the Preferences menu, enter its ID in a
				
	<removeditem> element. For example, to remove the
				Ant section from the Preferences
			dialog, enter its ID in the eclipseui.xml file as
			follows:<section id="preferences">
   <removeditem id="org.eclipse.ant.ui.AntPreferencePage"/>