private void addCommentHistoryRecord(DBRecord commentRec, CommentType commentType) {
		String comment = commentRec.getString(commentType.ordinal());
		if (comment != null) {
			createCommentHistoryRecord(addrMap.decodeAddress(commentRec.getKey()), commentType,
				comment, "");
		}
	}
Add comment history records for comments being deleted.
@param start start address
@param end end address
@throws IOException if there is an exception
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CodeManager.java