Fix duplicate addon.d entry for 30-gapps.sh

* Now that this is generated at install time,
  30-gapps.sh will be found automatically,
  so we can remove the hardcoded entry for it

Change-Id: Ic7287dbec45a2e7f7314d98f5f8abfdb4dec1964
Signed-off-by: Paul Keith <[email protected]>

addond_head

@@ -6,4 +6,3 @@
 
 list_files() {
 cat <<EOF
-addon.d/30-gapps.sh