Drop info.DP (#5370)
Drop info.DP (#5370)

It is unnecessary to store it during merging as it is computed from
a dense MT in summarize.
danking/hail,danking/hail,cseed/hail,hail-is/hail,cseed/hail,hail-is/hail,hail-is/hail,cseed/hail,danking/hail,cseed/hail,cseed/hail,danking/hail,hail-is/hail,danking/hail,hail-is/hail,danking/hail,cseed/hail,cseed/hail,cseed/hail,hail-is/hail,danking/hail,hail-is/hail,danking/hail,hail-is/hail