Remove no-longer-needed phony typedefs in genbki.h.
Remove no-longer-needed phony typedefs in genbki.h.

Now that we have a policy of hiding varlena catalog fields behind
"#ifdef CATALOG_VARLEN", there is no need for their type names to be
acceptable to the C compiler.  And experimentation shows that it does
not matter to pgindent either.  (If it did, we'd have problems anyway,
since these typedefs are unreferenced so far as the C compiler is
concerned, and find_typedef fails to identify such typedefs.)

Hence, remove the phony typedefs that genbki.h provided to make
some varlena field definitions compilable.

In passing, rearrange #define's into what seemed a more logical order.

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