Hotfix: Remove form alter for media config settings.

## Ready State: Yes

This is included in media module now with the latest dev version
being used in imagex_media.

## Requirements & Dependencies

* None

## Deployment Instructions

* Merge code.
* Clear caches with `drush cache-clear all`

## Usage/Test Instructions

* Browse to media browser config settings and make sure there are wysiwyg settings there to save /admin/config/media/browser