Remove --warning=no-unknown-keyword from tar extraction again

Change-Id: I70d9cb14731ffd925021d02b67d693e2886b6e33
diff --git a/infoCenter/app/createInfoCenter.sh b/infoCenter/app/createInfoCenter.sh
index 921c8a7..5bb5bdf 100755
--- a/infoCenter/app/createInfoCenter.sh
+++ b/infoCenter/app/createInfoCenter.sh
@@ -71,7 +71,7 @@
   fi
 
   # Extract eclipse-platform
-  tar --warning=no-unknown-keyword xzf eclipse-platform*.tar.gz -C ${workdir}
+  tar xzf eclipse-platform*.tar.gz -C ${workdir}
 
   # Copy eclipse/plugin_customization.ini
   echo "Copying plugin_customization.ini..."