Touching to update.

Author: Clément

source/lectures/data/AVLtrees.md

@@ -58,7 +58,6 @@ which needs to be re-balanced using the `Doubleleftchild` method given below. In
 !include code/projects/AVLTree/AVLTree/AVLTree.cs
 ```
 
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 ### Computing the height on the fly
 
 It is also possible to compute the height of nodes "on the fly" instead of storing it.