Remove unused function parameters in pg_backup_archiver.c.

Remove unused function parameters in pg_backup_archiver.c.

Thanks to commit 9c02e3a986, which modified some of the changes
from commit a0a4601765, we can remove the now-unused ArchiveHandle
parameter from _tocEntryRestorePass() and move_to_ready_heap().

Reviewed-by: Jeff Davis <[email protected]>
Discussion: https://postgr.es/m/Z-3x2AnPCP331JA3%40nathan