Cleaning up quick settings flag in Settings app

Removes all instances of a11y_qs_enabled. Any code that would be nontrivial to remove has been deprecated for later cleanup.

Test: atest com.android.settings.accessibility
Flag: EXEMPT flag cleanup
Bug: 367414968

Change-Id: I81f3c9cee377535eaa552a170d58ec1a79d1da65

src/com/android/settings/accessibility/AccessibilityShortcutsTutorial.java

@@ -496,10 +496,6 @@ public final class AccessibilityShortcutsTutorial {
             if ((shortcutTypes & shortcutType) == 0) {
                 continue;
             }
-            if ((shortcutTypes & QUICK_SETTINGS) == QUICK_SETTINGS
-                    && !android.view.accessibility.Flags.a11yQsShortcut()) {
-                continue;
-            }
             tutorialPages.add(
                     createShortcutTutorialPage(
                             context, shortcutType, buttonMode, featureName, inSetupWizard));