More cleanup

src/include/optimizer/prep.h

src/include/parser/parse_coerce.h

src/include/postgres.h

src/include/storage/buf_internals.h

src/include/storage/bufpage.h

src/include/storage/itempos.h

src/include/storage/itemptr.h

src/include/storage/lock.h

src/include/storage/shmem.h

src/include/storage/sinvaladt.h

src/include/storage/smgr.h

src/include/utils/builtins.h

src/include/utils/psort.h

src/include/utils/rel.h

src/tools/pginclude/pgnoinclude