Description

I believe this was accidentally added in https://github.com/flutter/flutter/pull/67166/files#r500450922, but there is no reason for this parameter to be required. In fact, none of the subclasses mark it as required either.

Removing, since it is failing tests in google.

Related Issues

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Tests

I added the following tests:

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Checklist

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Breaking Change

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