Drop mmca prometheus federation
Drop mmca prometheus federation

Thanos will be in charge of it from now on

Related to T4385

SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site