dockerd: remove default -500 oom-score-adjust
dockerd: remove default -500 oom-score-adjust

dockerd currently sets the oom-score-adjust itself. This functionality
was added when we did not yet run dockerd as a systemd service.

Now that we do, it's better to instead have systemd handle this.

Keeping the option itself for situations where dockerd is started
manually or without using systemd.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

nawawi/docker,moby/moby,ibuildthecloud/docker,konstruktoid/docker-upstream,dims/docker,nawawi/docker,bearstech/moby,thaJeztah/docker,docker/docker,moby/moby,thaJeztah/docker,gnailuy/docker,Mokolea/docker,Mokolea/docker,ibuildthecloud/docker,Ramzec/docker,flavio/docker,moul/docker,moul/docker,AkihiroSuda/docker,AkihiroSuda/docker,nalind/docker,vdemeester/docker,ibuildthecloud/docker,justincormack/docker,trebonian/docker,thaJeztah/docker,jimjag/docker,docker/docker,paralin/docker,djs55/docker,paralin/docker,ibuildthecloud/docker,dims/docker,cpuguy83/docker,nalind/docker,gnailuy/docker,konstruktoid/docker-upstream,gnailuy/docker,AkihiroSuda/docker,yosifkit/docker,paralin/docker,AkihiroSuda/docker,bearstech/moby,justincormack/docker,Ramzec/docker,ibuildthecloud/docker,djs55/docker,moby/moby,mahak/docker,trebonian/docker,moul/docker,mahak/docker,vdemeester/docker,gnailuy/docker,kojiromike/docker,justincormack/docker,jameszhan/docker,Ramzec/docker,jimjag/docker,Mokolea/docker,bearstech/moby,yosifkit/docker,jimjag/docker,djs55/docker,flavio/docker,nawawi/docker,cpuguy83/docker,Mokolea/docker,moby/moby,docker/docker,konstruktoid/docker-upstream,jthelin/docker,yosifkit/docker,vdemeester/docker,flavio/docker,thaJeztah/docker,dims/docker,Ramzec/docker,flavio/docker,nawawi/docker,jthelin/docker,kojiromike/docker,bearstech/moby,cpuguy83/docker,nalind/docker,trebonian/docker,trebonian/docker,moul/docker,kojiromike/docker,jameszhan/docker,konstruktoid/docker-upstream,mahak/docker,yosifkit/docker,jameszhan/docker,nalind/docker,mahak/docker,jimjag/docker,paralin/docker,cpuguy83/docker