SettingsSectionFrame re-rendered the page heading and subtitle that
SettingsShell already paints from the section slug. No route used it;
only the per-section smoke tests rendered bodies through it to assert the
visible heading and its id.
Remove the component and move the heading wrapper those tests rely on
into a test-only harness that reproduces the shell's heading markup, so
the smoke tests keep asserting what the user actually sees.
Marc-André Bombeck
f4815fafe8