GitLab

The |hit_test_bounds_override_inner_| member of
aura::Window is no longer used, so remove it.
No functional changes.

BUG=344924
TEST=aura_unittests
TBR=varkha@chromium.org

Review-Url: https://codereview.chromium.org/2852653004
Cr-Commit-Position: refs/heads/master@{#468328}