Remove the "old"-style set_dummy_tlist_references()
Remove the "old"-style set_dummy_tlist_references()

It doesn't seem to be needed anymore. Window and Motion nodes have a
suitable targetlist nowadays, so no need to reach out to their child node
for one.

edespino/gpdb,edespino/gpdb,ahachete/gpdb,adam8157/gpdb,foyzur/gpdb,tangp3/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,atris/gpdb,greenplum-db/gpdb,CraigHarris/gpdb,chrishajas/gpdb,zaksoup/gpdb,royc1/gpdb,lisakowen/gpdb,Quikling/gpdb,cjcjameson/gpdb,zaksoup/gpdb,zaksoup/gpdb,edespino/gpdb,0x0FFF/gpdb,greenplum-db/gpdb,xuegang/gpdb,xinzweb/gpdb,Chibin/gpdb,lintzc/gpdb,lintzc/gpdb,Chibin/gpdb,Quikling/gpdb,randomtask1155/gpdb,lintzc/gpdb,ashwinstar/gpdb,janebeckman/gpdb,zaksoup/gpdb,jmcatamney/gpdb,yuanzhao/gpdb,zaksoup/gpdb,kaknikhil/gpdb,tangp3/gpdb,janebeckman/gpdb,foyzur/gpdb,kaknikhil/gpdb,Quikling/gpdb,rvs/gpdb,50wu/gpdb,atris/gpdb,edespino/gpdb,Chibin/gpdb,Quikling/gpdb,janebeckman/gpdb,lisakowen/gpdb,greenplum-db/gpdb,rvs/gpdb,jmcatamney/gpdb,Chibin/gpdb,rvs/gpdb,chrishajas/gpdb,xinzweb/gpdb,randomtask1155/gpdb,tangp3/gpdb,xinzweb/gpdb,Quikling/gpdb,0x0FFF/gpdb,Quikling/gpdb,royc1/gpdb,xuegang/gpdb,foyzur/gpdb,lisakowen/gpdb,randomtask1155/gpdb,lpetrov-pivotal/gpdb,edespino/gpdb,CraigHarris/gpdb,ashwinstar/gpdb,lisakowen/gpdb,tangp3/gpdb,lpetrov-pivotal/gpdb,adam8157/gpdb,kaknikhil/gpdb,tangp3/gpdb,lisakowen/gpdb,yuanzhao/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,foyzur/gpdb,edespino/gpdb,yuanzhao/gpdb,janebeckman/gpdb,chrishajas/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,lpetrov-pivotal/gpdb,rubikloud/gpdb,50wu/gpdb,kaknikhil/gpdb,atris/gpdb,CraigHarris/gpdb,lintzc/gpdb,rubikloud/gpdb,jmcatamney/gpdb,ashwinstar/gpdb,jmcatamney/gpdb,royc1/gpdb,Quikling/gpdb,cjcjameson/gpdb,rvs/gpdb,xuegang/gpdb,xinzweb/gpdb,foyzur/gpdb,ahachete/gpdb,jmcatamney/gpdb,Chibin/gpdb,ashwinstar/gpdb,ahachete/gpdb,chrishajas/gpdb,randomtask1155/gpdb,CraigHarris/gpdb,ahachete/gpdb,xuegang/gpdb,Quikling/gpdb,0x0FFF/gpdb,edespino/gpdb,atris/gpdb,lisakowen/gpdb,edespino/gpdb,royc1/gpdb,rubikloud/gpdb,tangp3/gpdb,0x0FFF/gpdb,xuegang/gpdb,randomtask1155/gpdb,rvs/gpdb,Chibin/gpdb,jmcatamney/gpdb,Quikling/gpdb,yuanzhao/gpdb,xinzweb/gpdb,adam8157/gpdb,greenplum-db/gpdb,0x0FFF/gpdb,atris/gpdb,rvs/gpdb,xinzweb/gpdb,tangp3/gpdb,yuanzhao/gpdb,atris/gpdb,CraigHarris/gpdb,foyzur/gpdb,foyzur/gpdb,rubikloud/gpdb,rvs/gpdb,lpetrov-pivotal/gpdb,janebeckman/gpdb,rvs/gpdb,50wu/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,ashwinstar/gpdb,tangp3/gpdb,edespino/gpdb,Quikling/gpdb,rubikloud/gpdb,chrishajas/gpdb,adam8157/gpdb,xinzweb/gpdb,50wu/gpdb,janebeckman/gpdb,rubikloud/gpdb,jmcatamney/gpdb,kaknikhil/gpdb,ashwinstar/gpdb,zaksoup/gpdb,0x0FFF/gpdb,royc1/gpdb,randomtask1155/gpdb,Chibin/gpdb,50wu/gpdb,atris/gpdb,rvs/gpdb,CraigHarris/gpdb,kaknikhil/gpdb,atris/gpdb,lpetrov-pivotal/gpdb,lisakowen/gpdb,xuegang/gpdb,xinzweb/gpdb,janebeckman/gpdb,randomtask1155/gpdb,xuegang/gpdb,cjcjameson/gpdb,50wu/gpdb,greenplum-db/gpdb,lintzc/gpdb,rvs/gpdb,CraigHarris/gpdb,lisakowen/gpdb,chrishajas/gpdb,rubikloud/gpdb,royc1/gpdb,chrishajas/gpdb,Chibin/gpdb,yuanzhao/gpdb,randomtask1155/gpdb,janebeckman/gpdb,cjcjameson/gpdb,Chibin/gpdb,greenplum-db/gpdb,50wu/gpdb,chrishajas/gpdb,royc1/gpdb,zaksoup/gpdb,adam8157/gpdb,edespino/gpdb,0x0FFF/gpdb,lintzc/gpdb,royc1/gpdb,kaknikhil/gpdb,lintzc/gpdb,yuanzhao/gpdb,ahachete/gpdb,kaknikhil/gpdb,Chibin/gpdb,adam8157/gpdb,ashwinstar/gpdb,xuegang/gpdb,adam8157/gpdb,CraigHarris/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,cjcjameson/gpdb,yuanzhao/gpdb,lintzc/gpdb,adam8157/gpdb,janebeckman/gpdb,kaknikhil/gpdb,0x0FFF/gpdb,zaksoup/gpdb,ahachete/gpdb,kaknikhil/gpdb,lpetrov-pivotal/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,ahachete/gpdb,50wu/gpdb,foyzur/gpdb,ashwinstar/gpdb,xuegang/gpdb,lpetrov-pivotal/gpdb,ahachete/gpdb,lintzc/gpdb,rubikloud/gpdb,greenplum-db/gpdb