docs: remove unused image tag
docs: remove unused image tag
coreos/rkt,intelsdi-x/rkt,crawford/rkt,alban/rkt,luebken/rkt,mjg59/rkt,intfrr/rkt,lee212/rkt,marineam/rkt,rkt/rkt,coreos/rkt,markllama/rkt,s-urbaniak/rkt,cab105/rkt,sgotti/rkt,smarvin/rkt,intelsdi-x/rkt,wparad/rkt,joshix/rkt,jasonchaffee/rkt,klizhentas/rkt,matthaias/rkt,iankronquist/rkt,shtouff/rkt,kbrwn/rkt,mattthias/pkg-rkt,clearlinux/rkt,MabinGo/rkt,tixxdz/rkt,alexhersh/rkt,achanda/rkt,kbrwn/rkt,MattDees/rkt,intfrr/rkt,nhlfr/rkt,lucasallan/rkt,sinfomicien/rkt,squeed/rkt,Yhgenomics/rkt,adfernandes/rkt,monstermunchkin/rkt,sinfomicien/rkt,mike1729/rkt,iankronquist/rkt,fdserr/rkt,chrisseto/rkt,mattthias/pkg-rkt,il9ue/rkt,michelangelo13/rkt,achanda/rkt,dalanlan/rkt,dgonyeo/rkt,jonboulle/rkt,akshaykarle/rkt,lee212/rkt,krnowak/rkt,liugenping/rkt,klizhentas/rkt,ybubnov/rkt,joshix/rkt,marineam/rkt,linki/rkt,michelangelo13/rkt,rkt/rkt,kinvolk/rkt,clearlinux/rkt,chrisseto/rkt,tixxdz/rkt,endocode/rkt,MabinGo/rkt,iaguis/rkt,krnowak/rkt,rot26/rkt,crawford/rkt,smarvin/rkt,bsmr-go/rkt,s-urbaniak/rkt,maquanyi/rkt,cab105/rkt,monstermunchkin/rkt,jzelinskie/rkt,ChengTiesheng/rkt,michelangelo13/rkt,blixtra/rkt,lucasallan/rkt,squaremo/rkt,alexhersh/rkt,MabinGo/rkt,jasonchaffee/rkt,tmrts/rkt,matthaias/rkt,ChengTiesheng/rkt,kinvolk/rkt,liubq919/rkt,dgonyeo/rkt,xnox/rkt,Yhgenomics/rkt,achanda/rkt,smarvin/rkt,alexhersh/rkt,lucasallan/rkt,jakon89/rkt,linki/rkt,dalanlan/rkt,liubq919/rkt,markllama/rkt,coreos/rkt,shobhit85/rkt,yifan-gu/rkt,euank/rkt,shtouff/rkt,mike1729/rkt,fdserr/rkt,yifan-gu/rkt,crawford/rkt,iankronquist/rkt,rhvgoyal/rkt,dgonyeo/rkt,ChengTiesheng/rkt,monstermunchkin/rkt,maquanyi/rkt,endocode/rkt,jjlakis/rkt,jzelinskie/rkt,euank/rkt,nhlfr/rkt,jzelinskie/rkt,joshix/rkt,endocode/rkt,jjlakis/rkt,liugenping/rkt,adfernandes/rkt,rhvgoyal/rkt,yifan-gu/rocket,shobhit85/rkt,il9ue/rkt,rot26/rkt,fdserr/rkt,kinvolk/rkt,Wilybald/rkt,yifan-gu/rocket,tv42/rkt,yifan-gu/rocket,intelsdi-x/rkt,ybubnov/rkt,MattDees/rkt,jonboulle/rkt,squaremo/rkt,wparad/rkt,kinvolk/rkt,tmrts/rkt,Wilybald/rkt,joshix/rkt,jonboulle/rkt,rot26/rkt,mjg59/rkt,ybubnov/rkt,euank/rkt,Wilybald/rkt,Shashwatsh/rkt,tv42/rkt,bsmr-go/rkt,iaguis/rkt,clearlinux/rkt,sstabellini/rkt,blixtra/rkt,akshaykarle/rkt,tmrts/rkt,tv42/rkt,xnox/rkt,s-urbaniak/rkt,matthaias/rkt,jakon89/rkt,nhlfr/rkt,sstabellini/rkt,chrisseto/rkt,mike1729/rkt,Shashwatsh/rkt,bsmr-go/rkt,klizhentas/rkt,sgotti/rkt,squeed/rkt,squaremo/rkt,blixtra/rkt,lucasallan/rkt,luebken/rkt,kbrwn/rkt,intfrr/rkt,shtouff/rkt,rhvgoyal/rkt,luebken/rkt,lee212/rkt,sgotti/rkt,liubq919/rkt,jjlakis/rkt,mattthias/pkg-rkt,sstabellini/rkt,mjg59/rkt,maquanyi/rkt,MattDees/rkt,cab105/rkt,adfernandes/rkt,tixxdz/rkt,shobhit85/rkt,alban/rkt,il9ue/rkt,krnowak/rkt,Wilybald/rkt,liugenping/rkt,akshaykarle/rkt,squeed/rkt,iaguis/rkt,jasonchaffee/rkt,jakon89/rkt,xnox/rkt,marineam/rkt,markllama/rkt,rkt/rkt,Shashwatsh/rkt,yifan-gu/rkt,linki/rkt,Yhgenomics/rkt,alban/rkt,wparad/rkt,dalanlan/rkt,sinfomicien/rkt,rkt/rkt