Revert "Register Alarms Timers Manager event listener for timer events."

This reverts commit 03f18d657fb317d32d6b2e1502df786f59338140.

Reason for revert: causing chrome crash

Original change's description:
> Register Alarms Timers Manager event listener for timer events.
>
> Bug: b:119116816
> Change-Id: I00359bb21a310fb230459d8f651d50a01d45e5fe
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1461505
> Commit-Queue: Li Lin <[email protected]>
> Reviewed-by: Daniel Cheng <[email protected]>
> Reviewed-by: Xiaohui Chen <[email protected]>
> Cr-Commit-Position: refs/heads/master@{#645599}

[email protected],[email protected],[email protected],[email protected]

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 948857
Bug: b:119116816
Change-Id: Ida4cb1ab90cebb2a54335376497d98a77d056a17
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1549570
Commit-Queue: Xiaohui Chen <[email protected]>
Reviewed-by: Xiaohui Chen <[email protected]>
Cr-Commit-Position: refs/heads/master@{#647019}
7 files changed