remove unnecessary opam line
remove unnecessary opam line

DistributedComponents/verdi-aggregation,DistributedComponents/verdi-aggregation,DistributedComponents/verdi-chord,uwplse/verdi-raft,guiquanz/verdi,DistributedComponents/verdi-chord,palmskog/verdi,palmskog/verdi,DistributedComponents/verdi-aggregation,guiquanz/verdi,uwplse/verdi-raft,lolisa/verdi,DistributedComponents/verdi-chord,DistributedComponents/verdi-chord,uwplse/verdi,uwplse/verdi-raft,palmskog/verdi,uwplse/verdi-raft,DistributedComponents/verdi-aggregation,lolisa/verdi,DistributedComponents/verdi-chord,uwplse/verdi,uwplse/verdi-raft