remove copydb

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #915 (130f947) into master (e0d34b7) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #915      +/-   ##
==========================================
+ Coverage   49.36%   49.39%   +0.02%     
==========================================
  Files         415      415              
  Lines       46577    46545      -32     
==========================================
- Hits        22995    22989       -6     
+ Misses      21583    21555      -28     
- Partials     1999     2001       +2     

Impacted Files	Coverage Δ
cmd/cortex/chaincmd.go	0.00% <ø> (ø)
consensus/cuckoo/sealer.go	0.00% <0.00%> (-5.76%)	⬇️
consensus/cuckoo/cuckoo.go	30.86% <0.00%> (-4.94%)	⬇️
p2p/discover/table.go	82.48% <0.00%> (-1.83%)	⬇️
ctxc/sync.go	56.83% <0.00%> (-1.44%)	⬇️
p2p/discover/v5_udp.go	80.53% <0.00%> (-1.34%)	⬇️
p2p/peer.go	75.52% <0.00%> (-1.05%)	⬇️
p2p/simulations/http.go	66.02% <0.00%> (-0.65%)	⬇️
ctxc/downloader/queue.go	80.48% <0.00%> (-0.55%)	⬇️
p2p/server.go	65.52% <0.00%> (-0.43%)	⬇️
... and 7 more