api: remove default values for parameters on endpoints. the apidoc module breaking is expected.
api: remove default values for parameters on endpoints. the apidoc module breaking is expected.

Reviewers: #developers

Differential Revision: https://forge.softwareheritage.org/D11

SoftwareHeritage/swh-web-ui,SoftwareHeritage/swh-web-ui,SoftwareHeritage/swh-web-ui