remove nil check

Author: pankaj-bind

src/Containers-AVL-Tree-Tests/CTAVLTreeTest.class.st

@@ -46,13 +46,6 @@ CTAVLTreeTest >> testAddForRRrotation [
 	self assert: data asArray equals: { 1. 2. 3 }
 ]
 
-{ #category : 'tests' }
-CTAVLTreeTest >> testAddNil [
-    tree add: nil.
-    self assert: (tree includes: nil).
-    self assert: tree size equals: 1.
-]
-
 { #category : 'tests' }
 CTAVLTreeTest >> testAddOneElement [