Remove dead structs.
Remove dead structs.

These are not used with the new WAL format anymore. GIN split records are
simply always recorded as full-page images.

Michael Paquier

pavanvd/postgres-xl,lisakowen/gpdb,pavanvd/postgres-xl,pavanvd/postgres-xl,jmcatamney/gpdb,ashwinstar/gpdb,techdragon/Postgres-XL,zeroae/postgres-xl,50wu/gpdb,adam8157/gpdb,ashwinstar/gpdb,adam8157/gpdb,zeroae/postgres-xl,jmcatamney/gpdb,lisakowen/gpdb,greenplum-db/gpdb,adam8157/gpdb,ashwinstar/gpdb,50wu/gpdb,adam8157/gpdb,jmcatamney/gpdb,techdragon/Postgres-XL,zeroae/postgres-xl,50wu/gpdb,greenplum-db/gpdb,xinzweb/gpdb,50wu/gpdb,xinzweb/gpdb,ashwinstar/gpdb,techdragon/Postgres-XL,Postgres-XL/Postgres-XL,oberstet/postgres-xl,lisakowen/gpdb,ovr/postgres-xl,lisakowen/gpdb,greenplum-db/gpdb,zeroae/postgres-xl,lisakowen/gpdb,yazun/postgres-xl,oberstet/postgres-xl,lisakowen/gpdb,ashwinstar/gpdb,greenplum-db/gpdb,ovr/postgres-xl,Postgres-XL/Postgres-XL,Postgres-XL/Postgres-XL,xinzweb/gpdb,yazun/postgres-xl,oberstet/postgres-xl,Postgres-XL/Postgres-XL,50wu/gpdb,greenplum-db/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,pavanvd/postgres-xl,pavanvd/postgres-xl,50wu/gpdb,greenplum-db/gpdb,zeroae/postgres-xl,lisakowen/gpdb,oberstet/postgres-xl,jmcatamney/gpdb,ovr/postgres-xl,ovr/postgres-xl,adam8157/gpdb,xinzweb/gpdb,yazun/postgres-xl,jmcatamney/gpdb,50wu/gpdb,ashwinstar/gpdb,techdragon/Postgres-XL,techdragon/Postgres-XL,yazun/postgres-xl,xinzweb/gpdb,greenplum-db/gpdb,xinzweb/gpdb,50wu/gpdb,jmcatamney/gpdb,ovr/postgres-xl,yazun/postgres-xl,Postgres-XL/Postgres-XL,adam8157/gpdb,greenplum-db/gpdb,lisakowen/gpdb,xinzweb/gpdb,ashwinstar/gpdb,ashwinstar/gpdb,adam8157/gpdb,adam8157/gpdb,jmcatamney/gpdb,xinzweb/gpdb