excise added material of PR-138; PR causing mobile-to-mobile malfunction

Pull Request Template

#### What's this PR do?
This PR reverses [PR-138](https://github.com/DoSomething/ds-mdata-responder/pull/138), a pull request which was written to address [this JIRA issue](https://jira.dosomething.org/browse/SMS-63). We found that PR-138 prevented mobile-to-mobile game creation beta invite messages from being sent. 

All excisions are marked with block comments, like so: `/** PR-138 EXCISION`. 

#### Where should the reviewer start?
`SGCompetitiveStoryController.` 

#### How should this be manually tested?
By creating an SMS game, mobile-to-mobile. 

#### Any background context you want to provide?
More debug content (albeit a bit disjointed) available [here](https://www.evernote.com/shard/s114/sh/74ecee94-b65c-4db1-a6cf-f9c3d9689ea0/237440e0e2f484715786be7b2f352343). 

#### What are the relevant tickets?
JIRA SMS-63.