Remove outdated comment about 8 arguments.
Remove outdated comment about 8 arguments.

yuanzhao/gpdb,atris/gpdb,zaksoup/gpdb,foyzur/gpdb,ovr/postgres-xl,janebeckman/gpdb,arcivanov/postgres-xl,kaknikhil/gpdb,arcivanov/postgres-xl,lisakowen/gpdb,lintzc/gpdb,0x0FFF/gpdb,adam8157/gpdb,postmind-net/postgres-xl,postmind-net/postgres-xl,lpetrov-pivotal/gpdb,CraigHarris/gpdb,0x0FFF/gpdb,edespino/gpdb,kaknikhil/gpdb,postmind-net/postgres-xl,xuegang/gpdb,CraigHarris/gpdb,postmind-net/postgres-xl,50wu/gpdb,50wu/gpdb,oberstet/postgres-xl,zaksoup/gpdb,lpetrov-pivotal/gpdb,pavanvd/postgres-xl,ovr/postgres-xl,greenplum-db/gpdb,atris/gpdb,foyzur/gpdb,jmcatamney/gpdb,chrishajas/gpdb,Quikling/gpdb,randomtask1155/gpdb,Quikling/gpdb,zaksoup/gpdb,rvs/gpdb,lpetrov-pivotal/gpdb,jmcatamney/gpdb,50wu/gpdb,adam8157/gpdb,snaga/postgres-xl,chrishajas/gpdb,0x0FFF/gpdb,Postgres-XL/Postgres-XL,rvs/gpdb,atris/gpdb,kaknikhil/gpdb,0x0FFF/gpdb,Chibin/gpdb,xinzweb/gpdb,atris/gpdb,adam8157/gpdb,xuegang/gpdb,ashwinstar/gpdb,CraigHarris/gpdb,Chibin/gpdb,cjcjameson/gpdb,ahachete/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,ashwinstar/gpdb,Postgres-XL/Postgres-XL,foyzur/gpdb,lisakowen/gpdb,tangp3/gpdb,Chibin/gpdb,cjcjameson/gpdb,rvs/gpdb,kaknikhil/gpdb,janebeckman/gpdb,kmjungersen/PostgresXL,50wu/gpdb,tangp3/gpdb,Postgres-XL/Postgres-XL,Chibin/gpdb,arcivanov/postgres-xl,rubikloud/gpdb,Quikling/gpdb,xuegang/gpdb,rubikloud/gpdb,cjcjameson/gpdb,jmcatamney/gpdb,tangp3/gpdb,janebeckman/gpdb,Quikling/gpdb,pavanvd/postgres-xl,kaknikhil/gpdb,jmcatamney/gpdb,lisakowen/gpdb,lisakowen/gpdb,xinzweb/gpdb,Postgres-XL/Postgres-XL,tangp3/gpdb,lintzc/gpdb,randomtask1155/gpdb,janebeckman/gpdb,kaknikhil/gpdb,adam8157/gpdb,zeroae/postgres-xl,chrishajas/gpdb,janebeckman/gpdb,greenplum-db/gpdb,ashwinstar/gpdb,tpostgres-projects/tPostgres,rubikloud/gpdb,edespino/gpdb,Quikling/gpdb,lisakowen/gpdb,xinzweb/gpdb,adam8157/gpdb,techdragon/Postgres-XL,rvs/gpdb,yuanzhao/gpdb,tpostgres-projects/tPostgres,rubikloud/gpdb,rubikloud/gpdb,Chibin/gpdb,yuanzhao/gpdb,snaga/postgres-xl,lintzc/gpdb,tpostgres-projects/tPostgres,chrishajas/gpdb,randomtask1155/gpdb,lintzc/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,ahachete/gpdb,edespino/gpdb,jmcatamney/gpdb,lintzc/gpdb,atris/gpdb,randomtask1155/gpdb,janebeckman/gpdb,oberstet/postgres-xl,edespino/gpdb,lisakowen/gpdb,cjcjameson/gpdb,zeroae/postgres-xl,chrishajas/gpdb,chrishajas/gpdb,royc1/gpdb,lisakowen/gpdb,jmcatamney/gpdb,Quikling/gpdb,kmjungersen/PostgresXL,pavanvd/postgres-xl,edespino/gpdb,oberstet/postgres-xl,edespino/gpdb,zeroae/postgres-xl,edespino/gpdb,xinzweb/gpdb,ahachete/gpdb,foyzur/gpdb,lintzc/gpdb,50wu/gpdb,techdragon/Postgres-XL,xinzweb/gpdb,zaksoup/gpdb,ashwinstar/gpdb,zaksoup/gpdb,yazun/postgres-xl,oberstet/postgres-xl,pavanvd/postgres-xl,cjcjameson/gpdb,xuegang/gpdb,kmjungersen/PostgresXL,adam8157/gpdb,Postgres-XL/Postgres-XL,xuegang/gpdb,Quikling/gpdb,janebeckman/gpdb,chrishajas/gpdb,xinzweb/gpdb,oberstet/postgres-xl,50wu/gpdb,ovr/postgres-xl,cjcjameson/gpdb,50wu/gpdb,greenplum-db/gpdb,jmcatamney/gpdb,rvs/gpdb,0x0FFF/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,0x0FFF/gpdb,50wu/gpdb,janebeckman/gpdb,cjcjameson/gpdb,greenplum-db/gpdb,zaksoup/gpdb,rubikloud/gpdb,CraigHarris/gpdb,lpetrov-pivotal/gpdb,tangp3/gpdb,xuegang/gpdb,yazun/postgres-xl,CraigHarris/gpdb,lpetrov-pivotal/gpdb,techdragon/Postgres-XL,CraigHarris/gpdb,Chibin/gpdb,greenplum-db/gpdb,arcivanov/postgres-xl,lpetrov-pivotal/gpdb,kaknikhil/gpdb,xuegang/gpdb,tangp3/gpdb,cjcjameson/gpdb,techdragon/Postgres-XL,royc1/gpdb,Quikling/gpdb,Chibin/gpdb,CraigHarris/gpdb,randomtask1155/gpdb,lisakowen/gpdb,zeroae/postgres-xl,rubikloud/gpdb,adam8157/gpdb,rvs/gpdb,CraigHarris/gpdb,ahachete/gpdb,CraigHarris/gpdb,royc1/gpdb,cjcjameson/gpdb,randomtask1155/gpdb,lintzc/gpdb,tangp3/gpdb,lintzc/gpdb,edespino/gpdb,lpetrov-pivotal/gpdb,tangp3/gpdb,ashwinstar/gpdb,randomtask1155/gpdb,xuegang/gpdb,postmind-net/postgres-xl,techdragon/Postgres-XL,0x0FFF/gpdb,zeroae/postgres-xl,yuanzhao/gpdb,royc1/gpdb,pavanvd/postgres-xl,yazun/postgres-xl,yuanzhao/gpdb,janebeckman/gpdb,kmjungersen/PostgresXL,snaga/postgres-xl,lintzc/gpdb,yuanzhao/gpdb,ahachete/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,foyzur/gpdb,ahachete/gpdb,yuanzhao/gpdb,ovr/postgres-xl,royc1/gpdb,atris/gpdb,Chibin/gpdb,adam8157/gpdb,0x0FFF/gpdb,ovr/postgres-xl,tpostgres-projects/tPostgres,foyzur/gpdb,rvs/gpdb,royc1/gpdb,Chibin/gpdb,ashwinstar/gpdb,yazun/postgres-xl,kaknikhil/gpdb,rvs/gpdb,ashwinstar/gpdb,snaga/postgres-xl,ashwinstar/gpdb,edespino/gpdb,Chibin/gpdb,xinzweb/gpdb,kmjungersen/PostgresXL,foyzur/gpdb,zaksoup/gpdb,snaga/postgres-xl,yuanzhao/gpdb,greenplum-db/gpdb,ahachete/gpdb,foyzur/gpdb,rvs/gpdb,xuegang/gpdb,janebeckman/gpdb,royc1/gpdb,atris/gpdb,arcivanov/postgres-xl,ahachete/gpdb,arcivanov/postgres-xl,Quikling/gpdb,xinzweb/gpdb,atris/gpdb,royc1/gpdb,edespino/gpdb,rubikloud/gpdb,Quikling/gpdb,tpostgres-projects/tPostgres,chrishajas/gpdb,rvs/gpdb,yazun/postgres-xl,randomtask1155/gpdb,jmcatamney/gpdb,zaksoup/gpdb