All EMB design file when exported to DST file format, will contain the DGT file to it.
If you DO NOT need the DGT file, when you export a machine file in DST file format, before you click on the save and button, follow the STEP below
Click on the Options... button
Untick the save file icon box
Once you do this, you will no longer get the DGT file.
RESULT : NO DGT File