@Override
		public boolean delete() throws IOException {
			if (lastKey == null) {
				return false;
			}
			synchronized (db) {
				Field[] keys = findPrimaryKeys(lastKey.getIndexedField());
				for (Field key : keys) {
					primaryTable.deleteRecord(key);
				}
				lastKey = null;
				return true;
			}
		}
Delete all primary records which have the current
index value (lastKey).
@see db.DBFieldIterator#delete()
Ghidra/Framework/DB/src/main/java/db/FieldIndexTable.java