Use Delete-Segment to remove the Selected-Segment.
Use your mouse to select a segment. It is now the Selected-Segment.
To delete the Selected-Segment:
The Selected-Segment has been removed from the motion.
There is one less segment in the motion.
The Segment Width of the Previous-Segment increases by the Segment-Width of the segment that you delete.
You will not get a warning that you will delete the segment.
Do CTRL+Z to undo, but the Motion-Width may increase.