Updated comment to fix Doctrine creating getters/setters using CLI

## Problem
When using the CLI for generating getters/settings with Doctrine,
The following line
```bash
app/console generate:doctrine:entities
```
Throw the following error:
```bash
[Doctrine\Common\Annotations\AnnotationException]                                                                                                                               
[Semantical Error] The annotation "@remark" in class Backend\Modules\Pages\Actions\Copy was never imported. Did you maybe forget to add a "use" statement for this annotation? 
```

## Solution
So I removed the "@"-sign.