Update checkMirrorsUtility script

Change-Id: I1031fcf7febd12f4eb2d524982d82dfb7a408fc0
Signed-off-by: Frederic Gurr <frederic.gurr@eclipse-foundation.org>
diff --git a/checkMirrorsUtility/checkMirrors.sh b/checkMirrorsUtility/checkMirrors.sh
index a21cf79..56dbe80 100755
--- a/checkMirrorsUtility/checkMirrors.sh
+++ b/checkMirrorsUtility/checkMirrors.sh
@@ -137,9 +137,6 @@
 if [ -z "${urls}" ]; then
   urls="\
     /tools/orbit/downloads/drops/R20160520211859/repository/ \
-    /releases/oxygen/201803211000/ \
-    /releases/photon/201806271001/ \
-    /releases/2018-12/201812191000/ \
     /releases/2019-03/201903201000/ \
     /releases/2019-06/201906191000/ \
     /releases/2019-09/201909181001/ \
@@ -147,16 +144,14 @@
     /releases/2020-03/202003181000/ \
     /releases/2020-06/202006171000/ \
     /releases/2020-09/202009161000/ \
-    /technology/epp/packages/neon/ \
-    /technology/epp/packages/oxygen/ \
-    /technology/epp/packages/photon/ \
-    /technology/epp/packages/2018-09/ \
+    /releases/2020-12/202012161000/ \
     /technology/epp/packages/2019-03/ \
     /technology/epp/packages/2019-09/ \
     /technology/epp/packages/2019-12/ \
     /technology/epp/packages/2020-03/ \
     /technology/epp/packages/2020-06/ \
     /technology/epp/packages/2020-09/ \
+    /technology/epp/packages/2020-12/ \
     /cbi/updates/aggregator/ide/4.8/ \
     /cbi/updates/aggregator/headless/4.8/ \
     /eclipse/updates/4.6/R-4.6-201606061100 \