Do not archive OCR texts

Steps to reproduce:
1. Upload an presentation
2. Publish the presentation again (Recordings->Events->Actions->"Start task"->Publish

Actual Results:
The OCR texts are now archived twice.

Expected Results:
There shouldn't be multiple versions of OCR texts in the archive. Actually, there is not much point in archiving this since it will be regenerated by ng-partial-publish anyway.

Workaround (if any):