runconfig/config_test.go: remove unused test-utilities
runconfig/config_test.go: remove unused test-utilities

The tests using these functions were removed in e89b6e8c2d2c36c43f22aeaf2a885646c2994051

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

bearstech/moby,paralin/docker,cpuguy83/docker,thaJeztah/docker,pradipd/moby,bearstech/moby,estesp/docker,jimjag/docker,yosifkit/docker,AkihiroSuda/docker,mahak/docker,AkihiroSuda/docker,bearstech/moby,Ramzec/docker,moul/docker,estesp/docker,konstruktoid/docker-upstream,jameszhan/docker,justincormack/docker,AkihiroSuda/docker,docker/docker,Mokolea/docker,nalind/docker,thaJeztah/docker,moby/moby,paralin/docker,nawawi/docker,djs55/docker,jvanz/docker,djs55/docker,konstruktoid/docker-1,kojiromike/docker,trebonian/docker,paralin/docker,jthelin/docker,justincormack/docker,nalind/docker,moby/moby,gnailuy/docker,jimjag/docker,paralin/docker,ibuildthecloud/docker,mahak/docker,Ramzec/docker,nawawi/docker,gnailuy/docker,konstruktoid/docker-upstream,jameszhan/docker,estesp/docker,yosifkit/docker,dims/docker,justincormack/docker,dims/docker,Mokolea/docker,konstruktoid/docker-upstream,yongtang/docker,thaJeztah/docker,dims/docker,kojiromike/docker,jthelin/docker,thaJeztah/docker,yongtang/docker,gnailuy/docker,nalind/docker,yosifkit/docker,Mokolea/docker,cpuguy83/docker,AkihiroSuda/docker,Ramzec/docker,nalind/docker,mahak/docker,trebonian/docker,konstruktoid/docker-upstream,jvanz/docker,nawawi/docker,yosifkit/docker,jvanz/docker,mahak/docker,djs55/docker,jimjag/docker,moul/docker,ibuildthecloud/docker,yongtang/docker,moby/moby,flavio/docker,gnailuy/docker,trebonian/docker,trebonian/docker,SvenDowideit/docker,flavio/docker,ibuildthecloud/docker,docker/docker,flavio/docker,cpuguy83/docker,vdemeester/docker,pradipd/moby,docker/docker,SvenDowideit/docker,jameszhan/docker,moul/docker,moul/docker,konstruktoid/docker-1,SvenDowideit/docker,Mokolea/docker,kojiromike/docker,jimjag/docker,nawawi/docker,ibuildthecloud/docker,pradipd/moby,ibuildthecloud/docker,moby/moby,konstruktoid/docker-1,cpuguy83/docker,flavio/docker,vdemeester/docker,Ramzec/docker,vdemeester/docker,bearstech/moby