[Extensions] Remove renderer's WakeEventPage()

We had an ability for an extension renderer to wake up an event page;
this was only useful for the now-removed runtime.getBackgroundClient().
Remove it.

Bug: 332366095
Change-Id: I70688db54c597f288ece4b7925379db5e2efb6af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5645844
Reviewed-by: Tim <tjudkins@chromium.org>
Reviewed-by: Nasko Oskov <nasko@chromium.org>
Commit-Queue: Devlin Cronin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1318231}
NOKEYCHECK=True
GitOrigin-RevId: abe36fd704986c2e4f54b4bd35c291d6beb0e28c
1 file changed