Removed mirroring because too imperformant.

releng/org.yakindu.sct.releng/build/customTargets.xml

@@ -82,20 +82,6 @@
 			<iu id="org.eclipse.platform.ide" />
 			<slicingOptions includeOptional="false" includeNonGreedy="false" followStrict="true" />
 		</p2.mirror>
-
-		<!-- helios releases -->
-		<p2.mirror source="${downloadMirror}/releases/helios" destination="file:${repoBaseLocation}/releases_helios">
-			<iu id="org.eclipse.emf.sdk.feature.group" />
-			<iu id="org.eclipse.gmf.runtime.notation.sdk.feature.group" />
-			<iu id="org.eclipse.gmf.runtime.sdk.feature.group" />
-			<iu id="org.eclipse.xtext.sdk.feature.group" />
-		</p2.mirror>
-
-		<!-- Xtext Utils -->
-		<p2.mirror source="https://builds.itemis.de/jenkins/job/XTEXT_UTILS/lastSuccessfulBuild/artifact/buildDirectory/build_local_repository/" destination="file:${repoBaseLocation}/xtextutils">
-			<iu id="de.itemis.xtext.utils.jface.feature.group" />
-			<iu id="de.itemis.xtext.utils.gmf.feature.group" />
-		</p2.mirror>
 	</target>
 
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