void deletedRecord(DBRecord oldRecord) throws IOException {
		// Delete secondary index entries
		for (int indexedColumn : indexedColumns) {
			IndexTable indexTable = secondaryIndexes.get(indexedColumn);
			indexTable.deleteEntry(oldRecord);
		}
	}
Callback method for when existing records are deleted.
Used for maintaining indexes only.  May be called before 
the old record is actually deleted.
@param oldRecord record which has been deleted
@throws IOException thrown if IO error occurs
Ghidra/Framework/DB/src/main/java/db/Table.java