remove duplicate information in CONTRIBUTING.md (#1956) [ci skip]
remove duplicate information in CONTRIBUTING.md (#1956) [ci skip]


Perelandric/ponyc,Theodus/ponyc,jemc/ponyc,Praetonus/ponyc,dipinhora/ponyc,Praetonus/ponyc,sgebbie/ponyc,sgebbie/ponyc,Theodus/ponyc,cquinn/ponyc,boemmels/ponyc,Theodus/ponyc,kulibali/ponyc,cquinn/ponyc,Perelandric/ponyc,jemc/ponyc,Theodus/ponyc,ponylang/ponyc,CausalityLtd/ponyc,cquinn/ponyc,boemmels/ponyc,sgebbie/ponyc,boemmels/ponyc,Perelandric/ponyc,boemmels/ponyc,dipinhora/ponyc,cquinn/ponyc,CausalityLtd/ponyc,Perelandric/ponyc,ponylang/ponyc,dipinhora/ponyc,kulibali/ponyc,kulibali/ponyc,jemc/ponyc,sgebbie/ponyc,Praetonus/ponyc,ponylang/ponyc,kulibali/ponyc,Praetonus/ponyc,sgebbie/ponyc,Perelandric/ponyc,boemmels/ponyc,Theodus/ponyc,CausalityLtd/ponyc