Bug 38458 enhance 'remove from classpath' [reorg] [ccp]
20030604 No delete offered on external JAR's: It could ask to remove them from the class path
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/RemoveFromClasspathAction.java
/**
	 * Creates a new <code>RemoveFromClasspathAction</code>. The action requires
	 * that the selection provided by the site's selection provider is of type
	 * <code> org.eclipse.jface.viewers.IStructuredSelection</code>.
	 * 
	 * @param site the site providing context information for this action
	 */
	public RemoveFromClasspathAction(IWorkbenchSite site) {
		super(site);
		setText(ActionMessages.getString("RemoveFromClasspathAction.Remove")); 
		setToolTipText(ActionMessages.getString("RemoveFromClasspathAction.tooltip")); 
		WorkbenchHelp.setHelp(this, IJavaHelpContextIds.REMOVE_FROM_CLASSPATH_ACTION);
	}
	
	/* (non-Javadoc)
	 * Method declared in SelectionDispatchAction
	 */
	public void selectionChanged(IStructuredSelection selection) {
		setEnabled(checkEnabled(selection));
	}