Remove CreateIIIFInformation

https://redmine.teklia.com/issues/10642

We currently have two endpoints to import IIIF images, CreateIIIFURL and CreateIIIFInformation. The latter is only used in one worker which could easily use CreateIIIFURL instead. Most recent development happened around CreateIIIFURL, and both endpoints are diverging from each other. Removing CreateIIIFInformation can simplify the IIIF image management.