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Technically it was used in invalidation::ParseNotifierOptions, which
however was itself unused and is also removed.

Bug: none
Change-Id: Ic3e6bdc88a381875760892131479cecc4ac4dfe4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1942658
Commit-Queue: Tim Schumann <tschumann@chromium.org>
Auto-Submit: Marc Treib <treib@chromium.org>
Reviewed-by: Tim Schumann <tschumann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720160}