Remove unnecessary paragraph in Hydra API docs

[slashmo]

The removed paragraph makes sense in the /health/alive and health/ready endpoints documentation but feels misplaced for documenting the /version endpoint.

[aeneasr]

Thank you ! However, as noted at the top of the document, this file is being auto-generated. The appropriate line to fix this is here: https://github.com/ory/hydra/blob/master/health/doc.go#L106-L107