Employees can delete their gifs post

### Why

**As an Employee**
**I want to be able to delete a specific gifs post**
**So that such gifs post will be removed on the platform**

### Acceptance Criteria

```gherkin
Scenario: 
Given that an employee make a delete request on this endpoint (i.e api/v1/gifs/<:gifId>)
When such gif post to be removed exists on the platform 
Then such a post will be removed
```

