Remove unused compiler flags
Remove unused compiler flags

The Optimizer UDFs were in dfbbe82e222086387c3371643de0f55ae6bb67d3
made into a contrib module, remove leftover compiler flags variable.

cjcjameson/gpdb,yuanzhao/gpdb,lintzc/gpdb,lintzc/gpdb,lintzc/gpdb,lisakowen/gpdb,adam8157/gpdb,lisakowen/gpdb,janebeckman/gpdb,yuanzhao/gpdb,jmcatamney/gpdb,xinzweb/gpdb,Quikling/gpdb,cjcjameson/gpdb,50wu/gpdb,greenplum-db/gpdb,Quikling/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,50wu/gpdb,janebeckman/gpdb,kaknikhil/gpdb,edespino/gpdb,greenplum-db/gpdb,kaknikhil/gpdb,greenplum-db/gpdb,greenplum-db/gpdb,rvs/gpdb,adam8157/gpdb,edespino/gpdb,lintzc/gpdb,edespino/gpdb,greenplum-db/gpdb,rvs/gpdb,Chibin/gpdb,lisakowen/gpdb,rvs/gpdb,lisakowen/gpdb,lisakowen/gpdb,ashwinstar/gpdb,Chibin/gpdb,cjcjameson/gpdb,xinzweb/gpdb,xinzweb/gpdb,rvs/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,Chibin/gpdb,ashwinstar/gpdb,Quikling/gpdb,Chibin/gpdb,edespino/gpdb,rvs/gpdb,jmcatamney/gpdb,Quikling/gpdb,rvs/gpdb,adam8157/gpdb,jmcatamney/gpdb,greenplum-db/gpdb,adam8157/gpdb,cjcjameson/gpdb,50wu/gpdb,rvs/gpdb,greenplum-db/gpdb,lintzc/gpdb,Quikling/gpdb,jmcatamney/gpdb,xinzweb/gpdb,lintzc/gpdb,jmcatamney/gpdb,Chibin/gpdb,50wu/gpdb,ashwinstar/gpdb,lintzc/gpdb,kaknikhil/gpdb,50wu/gpdb,ashwinstar/gpdb,yuanzhao/gpdb,Chibin/gpdb,ashwinstar/gpdb,janebeckman/gpdb,cjcjameson/gpdb,lisakowen/gpdb,edespino/gpdb,ashwinstar/gpdb,janebeckman/gpdb,rvs/gpdb,janebeckman/gpdb,50wu/gpdb,Quikling/gpdb,yuanzhao/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,cjcjameson/gpdb,xinzweb/gpdb,xinzweb/gpdb,xinzweb/gpdb,lisakowen/gpdb,janebeckman/gpdb,jmcatamney/gpdb,Quikling/gpdb,janebeckman/gpdb,lintzc/gpdb,cjcjameson/gpdb,Quikling/gpdb,edespino/gpdb,kaknikhil/gpdb,janebeckman/gpdb,kaknikhil/gpdb,xinzweb/gpdb,ashwinstar/gpdb,edespino/gpdb,edespino/gpdb,Quikling/gpdb,kaknikhil/gpdb,Chibin/gpdb,lisakowen/gpdb,yuanzhao/gpdb,kaknikhil/gpdb,jmcatamney/gpdb,50wu/gpdb,edespino/gpdb,lintzc/gpdb,janebeckman/gpdb,cjcjameson/gpdb,Chibin/gpdb,yuanzhao/gpdb,Chibin/gpdb,edespino/gpdb,adam8157/gpdb,rvs/gpdb,jmcatamney/gpdb,rvs/gpdb,yuanzhao/gpdb,janebeckman/gpdb,greenplum-db/gpdb,50wu/gpdb,kaknikhil/gpdb,Chibin/gpdb,adam8157/gpdb,adam8157/gpdb,adam8157/gpdb,cjcjameson/gpdb,Quikling/gpdb