fix: Removed imageRegistry call

Author: gravemalte

plugins/de.ovgu.featureide.fm.ui/src/de/ovgu/featureide/fm/ui/FMUIPlugin.java

@@ -38,7 +38,6 @@
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.resource.ImageDescriptor;
-import org.eclipse.jface.resource.ImageRegistry;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.widgets.FileDialog;
 import org.eclipse.swt.widgets.Shell;
@@ -63,7 +62,6 @@ public class FMUIPlugin extends AbstractUIPlugin {
 	public static final String PLUGIN_ID = "de.ovgu.featureide.fm.ui";
 
 	private static FMUIPlugin plugin;
-	private static ImageRegistry registry = getDefault().getImageRegistry();
 
 	@Override
 	public String getID() {