api: remove useless comments

- We do return samples with their id.
- This header is not complete nor true, and does not serve anything
  nowadays.

Change-Id: I4b797887fb9ae63b10d67e9b22a5b4d30d7bd829
Updated from global requirements

Change-Id: Ic29edceca62daf7bfa6262df86e0c642e5b59fa0
Merge "Updated from global requirements"
Merge "api: remove useless comments"