delete collapse-20

xuanguang-li · xuanguang-li · commit 5ac5cdeb426b · 2025-08-19T14:17:00.000+08:00
diff --git a/lectures/von_neumann_model.md b/lectures/von_neumann_model.md
@@ -61,7 +61,6 @@ np.set_printoptions(precision=2)
 The code below provides the `Neumann` class
 
 ```{code-cell} ipython3
-:tags: [collapse-20]
 
 class Neumann:
 
