Android: Docs: Remove mention of adb shell setprop debug.assert 1

Without our new(ish) scheme of bytecode-rewriting asserts, the system
property isn't used.

NOTRY=true  # Doesn't affect bots

Change-Id: Ie0f9f2e9bb8674bba52380fc7983a13f54ae65f9
Reviewed-on: https://chromium-review.googlesource.com/692816
Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505400}
1 file changed