Clean up using_docker_images.md
Clean up using_docker_images.md

iiet/iiet-git,jirutka/gitlabhq,mmkassem/gitlabhq,screenpages/gitlabhq,screenpages/gitlabhq,yatish27/gitlabhq,yatish27/gitlabhq,dplarson/gitlabhq,martijnvermaat/gitlabhq,daiyu/gitlab-zh,daiyu/gitlab-zh,iiet/iiet-git,t-zuehlsdorff/gitlabhq,martijnvermaat/gitlabhq,koreamic/gitlabhq,SVArago/gitlabhq,shinexiao/gitlabhq,Datacom/gitlabhq,stoplightio/gitlabhq,yatish27/gitlabhq,Datacom/gitlabhq,axilleas/gitlabhq,allysonbarros/gitlabhq,jrjang/gitlab-ce,jrjang/gitlab-ce,SVArago/gitlabhq,dreampet/gitlab,larryli/gitlabhq,openwide-java/gitlabhq,SVArago/gitlabhq,mr-dxdy/gitlabhq,t-zuehlsdorff/gitlabhq,ttasanen/gitlabhq,mrb/gitlabhq,larryli/gitlabhq,openwide-java/gitlabhq,screenpages/gitlabhq,daiyu/gitlab-zh,cui-liqiang/gitlab-ce,LUMC/gitlabhq,icedwater/gitlabhq,ttasanen/gitlabhq,axilleas/gitlabhq,martijnvermaat/gitlabhq,htve/GitlabForChinese,stoplightio/gitlabhq,cui-liqiang/gitlab-ce,mrb/gitlabhq,LUMC/gitlabhq,allysonbarros/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,icedwater/gitlabhq,louahola/gitlabhq,jirutka/gitlabhq,allysonbarros/gitlabhq,Soullivaneuh/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git,dwrensha/gitlabhq,Soullivaneuh/gitlabhq,cui-liqiang/gitlab-ce,openwide-java/gitlabhq,koreamic/gitlabhq,allysonbarros/gitlabhq,dplarson/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,mrb/gitlabhq,darkrasid/gitlabhq,jrjang/gitlabhq,SVArago/gitlabhq,axilleas/gitlabhq,Soullivaneuh/gitlabhq,openwide-java/gitlabhq,icedwater/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,duduribeiro/gitlabhq,ttasanen/gitlabhq,louahola/gitlabhq,iiet/iiet-git,larryli/gitlabhq,LUMC/gitlabhq,mmkassem/gitlabhq,screenpages/gitlabhq,Datacom/gitlabhq,dreampet/gitlab,daiyu/gitlab-zh,shinexiao/gitlabhq,t-zuehlsdorff/gitlabhq,dwrensha/gitlabhq,larryli/gitlabhq,dreampet/gitlab,jrjang/gitlabhq,mr-dxdy/gitlabhq,mr-dxdy/gitlabhq,htve/GitlabForChinese,duduribeiro/gitlabhq,cui-liqiang/gitlab-ce,jrjang/gitlabhq,dwrensha/gitlabhq,darkrasid/gitlabhq,martijnvermaat/gitlabhq,jrjang/gitlab-ce,louahola/gitlabhq,htve/GitlabForChinese,dplarson/gitlabhq,mr-dxdy/gitlabhq,duduribeiro/gitlabhq,koreamic/gitlabhq,koreamic/gitlabhq,duduribeiro/gitlabhq,yatish27/gitlabhq,axilleas/gitlabhq,Soullivaneuh/gitlabhq,dplarson/gitlabhq,shinexiao/gitlabhq,LUMC/gitlabhq,jrjang/gitlab-ce,dwrensha/gitlabhq,shinexiao/gitlabhq,louahola/gitlabhq,htve/GitlabForChinese,mrb/gitlabhq,jrjang/gitlabhq,Datacom/gitlabhq,icedwater/gitlabhq,ttasanen/gitlabhq,darkrasid/gitlabhq,t-zuehlsdorff/gitlabhq