removed dependencies

plugins/org.yakindu.sct.refactoring/META-INF/MANIFEST.MF

@@ -14,8 +14,7 @@ Require-Bundle: org.eclipse.ui,
  de.itemis.xtext.utils.jface;bundle-version="1.0.0",
  org.yakindu.sct.model.stext.resource;bundle-version="1.0.0",
  org.eclipse.core.expressions,
- de.itemis.xtext.utils.gmf;bundle-version="2.1.2",
- com.yakindu.sct.ui.imagerenderer
+ de.itemis.xtext.utils.gmf;bundle-version="2.1.2"
 Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Bundle-ActivationPolicy: lazy
 Export-Package: org.yakindu.sct.refactoring.refactor