Make deleting quota return valid json
Make deleting quota return valid json

Avoid jquery/ajax getting confused when the response isn't valid json

jrgp/iris-api-opensource,jrgp/iris-api-opensource,dwang159/iris-api,jrgp/iris-api-opensource,linkedin/iris,dwang159/iris-api,linkedin/iris,houqp/iris-api,dwang159/iris-api,linkedin/iris,linkedin/iris,dwang159/iris-api,houqp/iris-api,jrgp/iris-api-opensource