private boolean dataTypeWasDeleted(long id, DataTypeManager dtm) {
		DataType dt1 = dtms[ORIGINAL].getDataType(id);
		DataType dt2 = dtm.getDataType(id);
		return dt1 != null && dt2 == null;
	}
Process categories that were deleted in MY program, but are not
conflicts, i.e., not renamed, moved, or deleted in LATEST.
@param id category ID
Ghidra/Features/Base/src/main/java/ghidra/app/merge/datatypes/DataTypeMergeManager.java