Delete outdated comment about a bug which was fixed three years ago
Delete outdated comment about a bug which was fixed three years ago

R=adamk
BUG=chromium:135066
LOG=N

Review URL: https://codereview.chromium.org/1279203002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#30118}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh