Remove --enable-applist-v2 since it's default now.
Remove --enable-applist-v2 since it's default now.

BUG=none.
TEST=App list should still use bubble style.

Change-Id: I7cb9349759e061c29badc421713e4870d3053d80
Reviewed-on: https://gerrit.chromium.org/gerrit/25235
Reviewed-by: Emmanuel R. Saint-Loubert-Bie <ff7e642d60481cb403a503ef875e432aea9151d8@chromium.org>
Commit-Ready: Xiyuan Xia <db97f61d07c31fd69698b8602ab9b0e934f96b23@chromium.org>
Tested-by: Xiyuan Xia <db97f61d07c31fd69698b8602ab9b0e934f96b23@chromium.org>

chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager,chadversary/chromiumos.platform.login_manager