azure: Remove duplicate assignment of vxlan-port setting

vxlan-port is anyway set by the `optionals` param in entrypoint.sh
Remove the ineffective duplicate assignment

Signed-off-by: Pradipta Banerjee <pradipta.banerjee@gmail.com>

src/cloud-api-adaptor/entrypoint.sh

@@ -90,7 +90,6 @@ azure() {
         -region "${AZURE_REGION}" \
         -instance-size "${AZURE_INSTANCE_SIZE}" \
         -resourcegroup "${AZURE_RESOURCE_GROUP}" \
-        -vxlan-port 8472 \
         -subnetid "${AZURE_SUBNET_ID}" \
         -securitygroupid "${AZURE_NSG_ID}" \
         -imageid "${AZURE_IMAGE_ID}" \