AVL tree does not rebalance after removal

[w8r]

Hi! Thanks for your project. I can't seem to find the removal algorithm in AVL tree: if it simply borrows the binary tree removal, it's incomplete. I was particularly interested in that, cause I have been looking for a removal procedure that doesn't mutate the nodes.

Cheers.

[huzaima]

Is it still open for contribution?

[trekhleb]

@huzaima yes it is open. You might want to take a look at #33 PR and cooperate with @Bladefidz to make it green.

[Bladefidz]

Hi @trekhleb and @huzaima, I am free at this weekend.

I will push some commits soon.

[arslan-ashraf]

Hey guys, I see the AVL tree still hasn't been fixed. I know how to make work. I would love to make a contribution to the repo but I don't have permission.

[trekhleb]

Removal is fixed now.