@Override
		protected String getItemText(DataType dt) {
			DataTypeManager dtm = dt.getDataTypeManager();
			String dtmName = (dtm != null) ? dtm.getName() : "";
			return dt.getName() + " - " + dtmName + dt.getPathName();
		}
Remove any unwanted data type items, like arrays.
Ghidra/Features/Base/src/main/java/ghidra/app/util/datatype/DataTypeDropDownSelectionDataModel.java