Remove "no focused window" log

There could be a race where the WM sets the focused display, but the
window infos containing a focusable window haven't been set yet. This
would result in scary-looking logs like "display doesn't have a focused
window".

The "no-focused-window" ANR should be moved to WM anyways. Currently
these logs just result in mis-triaging of bugs to our team.

Remove them.

Bug: 165321216
Test: none
Flag: EXEMPT refactor
Change-Id: I9f860bff352c709ec2e23864e4b24f4601376d5a