releng: Let xz-java be fetched by the platform.sdk feature instead of
hardcoding one.

Change-Id: I084e6f81dd3346fa40cf68493e27605d644d9ed6
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
diff --git a/org.eclipse.equinox.p2.releng/p2-photon.target b/org.eclipse.equinox.p2.releng/p2-photon.target
index 1999c43..b779d1d 100644
--- a/org.eclipse.equinox.p2.releng/p2-photon.target
+++ b/org.eclipse.equinox.p2.releng/p2-photon.target
@@ -8,10 +8,6 @@
 <repository location="http://download.eclipse.org/eclipse/updates/4.8"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-<unit id="org.tukaani.xz" version="1.8.0.v20180207-1613"/>
-<repository location="http://download.eclipse.org/tools/orbit/downloads/drops/R20180606145124/repository"/>
-</location>
-<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.equinox.http" version="0.0.0"/>
 <repository location="http://download.eclipse.org/eclipse/updates/4.0"/>
 </location>