INDeleteInfo encapsulates the information logged about the removal of a
child from an IN during IN compression.
As of JE 3.3.87, INDelete is no longer logged becaue the root compression
feature has been removed. However, INDelete must still be processed in log
files created with 3.3.87 and earlier. [#17546]
Obsolete in log version 8, only used by DupConvert and some log readers.
Used by logging system only.
boolean unpacked = (entryVersion < 6);