WebSocket: Remove 'Timeout' annotation from multiple-connections-throttled.html

This test was fixed by https://chromium-review.googlesource.com/c/chromium/src/+/985334

Bug: 825740
Change-Id: I5c732d2aa828ccecbe1f39ea79f168ee798521bb
TBR: nhiroki@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1013818
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550947}
2 files changed