1) Go to the Prototype section. Zoom out to have an overall view of all the artboards.
2) You will not be able to see any of the Prototype lines. Press Command + A (Select All). Now your Prototype wires can be seen. This selects only the prototype wires.
3) Hit Delete.
Boom. Done!
Be careful that none of your components gets selected. It happened once for me, but no worries. Just hit Command+Z (Undo), go to the Design section and back to Prototype section. Repeat from Step 1.
1) Go to the Prototype section. Zoom out to have an overall view of all the artboards.
2) You will not be able to see any of the Prototype lines. Press Command + A (Select All). Now your Prototype wires can be seen. This selects only the prototype wires.
3) Hit Delete.
Boom. Done!
Be careful that none of your components gets selected. It happened once for me, but no worries. Just hit Command+Z (Undo), go to the Design section and back to Prototype section. Repeat from Step 1.