removing videos from docs

docs/lessons/screen-wipe/activity.md

@@ -4,7 +4,7 @@ Clear the screen by pressing buttons on the micro:bit
 
 ### ~avatar avatar
 
-### @video td/videos/screen-wipe-0
+
 
 This activity will teach how to clear the screen by pressing button A on the micro:bit.
 

docs/lessons/screen-wipe/challenges.md

@@ -85,7 +85,7 @@ input.onButtonPressed(Button.B, () => {
 
 ### Challenge 2
 
-### @video td/videos/screen-wipe-2
+
 
 Replay the animation when the "B" button is pressed placing the `show LEDs` block on the canvas.