Cleanup: Remove old TODO
Cleanup: Remove old TODO

Was actually done in https://codereview.chromium.org/855773002, but
missed removing the comment.

Review URL: https://codereview.chromium.org/1829173002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#383167}

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