No role to download from ansible-galaxy. No need to download them.

Trying to keep an empty requirements.yml leads to the following error:

TASK [command] ***************************************************************** fatal: [localhost]: FAILED! => {"changed": true, "cmd": ["ansible-galaxy", "install", "-r", "requirements.yml", "--roles-path", "roles"], "delta": "0:00:00.460192", "end": "2023-04-25 16:23:57.955056", "msg": "non-zero return code", "rc": 1, "start": "2023-04-25 16:23:57.494864", "stderr": "ERROR! No requirements found in file '/root/.ansible/pull/iccluster133.iccluster.epfl.ch/requirements.yml'", "stderr_lines": ["ERROR! No requirements found in file '/root/.ansible/pull/iccluster133.iccluster.epfl.ch/requirements.yml'"], "stdout": "", "stdout_lines": []}