Bump neutron to 0.3.15

This sync asap2 patch to community work
diff --git a/hack/sync-charts.sh b/hack/sync-charts.sh
index 970c0b9..ecc08e0 100755
--- a/hack/sync-charts.sh
+++ b/hack/sync-charts.sh
@@ -132,7 +132,7 @@
 curl -sL https://github.com/rancher/local-path-provisioner/archive/refs/tags/v${LOCAL_PATH_PROVISIONER_VERSION}.tar.gz \
   | tar -xz -C ${ATMOSPHERE}/charts --strip-components=3 local-path-provisioner-${LOCAL_PATH_PROVISIONER_VERSION}/deploy/chart/
 
-NEUTRON_VERSION=0.3.13
+NEUTRON_VERSION=0.3.15
 curl -sL https://tarballs.opendev.org/openstack/openstack-helm/neutron-${NEUTRON_VERSION}.tgz \
   | tar -xz -C ${ATMOSPHERE}/charts
 curl 'https://review.opendev.org/changes/openstack%2Fopenstack-helm~883168/revisions/11/patch?download' \
@@ -141,12 +141,6 @@
   | filterdiff -p2 -x 'Chart.yaml' \
   | filterdiff -p1 -i 'neutron/*' \
   | patch -p2 -d ${ATMOSPHERE}/charts/neutron
-curl 'https://review.opendev.org/changes/openstack%2Fopenstack-helm~887354/revisions/2/patch?download' \
-  | base64 --decode \
-  | filterdiff -p1 -x 'releasenotes/*' \
-  | filterdiff -p2 -x 'Chart.yaml' \
-  | filterdiff -p1 -i 'neutron/*' \
-  | patch -p2 -d ${ATMOSPHERE}/charts/neutron
 
 NOVA_VERISON=0.3.10
 curl -sL https://tarballs.opendev.org/openstack/openstack-helm/nova-${NOVA_VERISON}.tgz \