Fix warning unused parameter samples

[CLAassistant]

All committers have signed the CLA.

[Bogumil-Sapinski-Mobica]

CI fails on SFML which was not changed in this PR. I kindly ask you to view and solve this issue as I do not have an access to CI process internals in order to fix it.

[bashbaug]

Merging as discussed in the September 12th teleconference. The CI failures are unrelated to these changes.