models/repo: fix repository files weren't cleaned up (#4167)
models/repo: fix repository files weren't cleaned up (#4167)

gogits/gogs,dancewing/gogs,gogits/gogs,liliexuan/gogs,pikacloud/pikacode,pikacloud/pikacode,wangjild/gogs,linquize/gogs,Spice-King/gogs,xaionaro/gogs,gogits/gogs,cgars/gogs,wangjild/gogs,linquize/gogs,Spice-King/gogs,liliexuan/gogs,Spice-King/gogs,chriswatt/gogs,chriswatt/gogs,mukaiu/gogs,linquize/gogs,cgars/gogs,xaionaro/gogs,psaavedra/gogs,psaavedra/gogs,dancewing/gogs,xaionaro/gogs,wangjild/gogs,dlob/gogs,ForxaCoLab/forxa,ForxaCoLab/forxa,dancewing/gogs,mukaiu/gogs,mukaiu/gogs,pikacloud/pikacode,ForxaCoLab/forxa,dlob/gogs,cgars/gogs,dancewing/gogs,psaavedra/gogs,dlob/gogs,chriswatt/gogs,liliexuan/gogs