Delete form responses when deleting an incident.
Remove redundant code for reports deleted from admin.

All of this is done in Incident_Model::delete(), including calling the report_delete action.
Remove unused deletePhoto function. Use Media_Model::delete() instead.
Typo in variable name
Merge pull request #1049 from solarissmoke/typo

Typo in variable name in Api_Object
Merge pull request #1041 from solarissmoke/bug-form_field

Delete form responses when deleting an incident.