Consider: when removing a validator, do we have to update their weight first?

[wildmolasses]

Current impl will reduce their validator weight on the registry via changeValidatorWeight before removing them via remove. Should we just call remove instead?

zkstaker/src/ZkStaker.sol

Lines 475 to 477 in 3228dfa

	if (_isInRegistry) {
	registry.changeValidatorWeight(_validatorOwner, _newWeight);
	if (!_isAboveThreshold) registry.remove(_validatorOwner);