NTK: No tic-tac-toe tournament

Author: hroncok

runs/2018/pyladies-praha-podzim-ntk/info.yml

@@ -118,9 +118,6 @@ plan:
 - base: asteroids
   date: 2018-11-28
   materials:
-  - title: Turnaj v piškvorkách
-    url: null
-    type: special
   - lesson: projects/snake
     type: lesson
   - +merge