Bug 127121 Fix warnings in UA plugins
We have many warnings in the UA plugins, most of them from org.eclipse.ua.tests as it uses internal code from the other plugins. In addition, there are unused imports, accessing a static method from an instance, unused local variables and deprecated code.
bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/ImageResource.java
public static final String IMG_CLCL_NAV_BACKWARD = "IMG_CLCL_NAV_BACKWARD"; 
	public static final String IMG_CLCL_NAV_FORWARD = "IMG_CLCL_NAV_FORWARD"; 
	public static final String IMG_CLCL_NAV_STOP = "IMG_CLCL_NAV_STOP"; 
	public static final String IMG_CLCL_NAV_REFRESH = "IMG_CLCL_NAV_REFRESH"; 
	public static final String IMG_CLCL_NAV_GO = "IMG_CLCL_NAV_GO"; 
	public static final String IMG_CLCL_NAV_HOME = "IMG_CLCL_NAV_HOME"; 
	public static final String IMG_CLCL_NAV_PRINT = "IMG_CLCL_NAV_PRINT"; 
	public static final String IMG_ELCL_NAV_BACKWARD = "IMG_ELCL_NAV_BACKWARD"; 
	public static final String IMG_ELCL_NAV_FORWARD = "IMG_ELCL_NAV_FORWARD"; 
	public static final String IMG_ELCL_NAV_STOP = "IMG_ELCL_NAV_STOP"; 
	public static final String IMG_ELCL_NAV_REFRESH = "IMG_ELCL_NAV_REFRESH"; 
	public static final String IMG_ELCL_NAV_GO = "IMG_ELCL_NAV_GO"; 
	public static final String IMG_ELCL_NAV_HOME = "IMG_ELCL_NAV_HOME"; 
	public static final String IMG_ELCL_NAV_PRINT = "IMG_ELCL_NAV_PRINT"; 
	public static final String IMG_DLCL_NAV_BACKWARD = "IMG_DLCL_NAV_BACKWARD"; 
	public static final String IMG_DLCL_NAV_FORWARD = "IMG_DLCL_NAV_FORWARD"; 
	public static final String IMG_DLCL_NAV_STOP = "IMG_DLCL_NAV_STOP"; 
	public static final String IMG_DLCL_NAV_REFRESH = "IMG_DLCL_NAV_REFRESH"; 
	public static final String IMG_DLCL_NAV_GO = "IMG_DLCL_NAV_GO"; 
	public static final String IMG_DLCL_NAV_HOME = "IMG_DLCL_NAV_HOME"; 
	public static final String IMG_DLCL_NAV_PRINT = "IMG_DLCL_NAV_PRINT"; 
	
	public static final String IMG_INTERNAL_BROWSER = "internalBrowser"; 
	public static final String IMG_EXTERNAL_BROWSER = "externalBrowser"; 
	public static final String IMG_SYSTEM_BROWSER = "systemBrowser"; 
	/**
	 * Cannot construct an ImageResource. Use static methods only.
	 */
	private ImageResource() {