Remove deprecated MAINTAINER instruction

2 jobs for master in 10 minutes and 17 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #7530
build

00:10:17

failed #7529
build

00:09:43

 
Name Stage Failure
failed
build Build
Reading package lists...
Building dependency tree...
Reading state information...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
INFO[0521] Taking snapshot of full filesystem...
INFO[0524] Resolving 55399 paths
INFO[0530] Deleting filesystem...
error pushing image: failed to push to destination registry.edugit.org/teckids/team-sysadmin/docker-images/python-pimped:master: Patch "https://registry.edugit.org/v2/teckids/team-sysadmin/docker-images/python-pimped/blobs/uploads/1b90cdb3-3c37-4863-b710-664764f24758?_state=-QWXRnj_MRa_MexLS1dFS9F0RBQmP3qaZn9ZFXcjha57Ik5hbWUiOiJ0ZWNraWRzL3RlYW0tc3lzYWRtaW4vZG9ja2VyLWltYWdlcy9weXRob24tcGltcGVkIiwiVVVJRCI6IjFiOTBjZGIzLTNjMzctNDg2My1iNzEwLTY2NDc2NGYyNDc1OCIsIk9mZnNldCI6MCwiU3RhcnRlZEF0IjoiMjAyMC0wNS0yM1QxNToxMjo0OS44Mjc4MTA1MTFaIn0%3D": stream error: stream ID 51; PROTOCOL_ERROR
ERROR: Job failed: exit code 1