Clean up usages of flag remove_qs_tooltip_in_suw

This bug-fixing flag has been in Trunkfood in two months.

Test: existing presubmit (no functional change)
Bug: 294560581
Change-Id: I05282f1f7ee6b1bb4e4bf873771d80ae68204b4c

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

@@ -210,8 +210,7 @@ abstract class PreviewSizeSeekBarController extends BasePreferenceController imp
             return;
         }
 
-        if (Flags.removeQsTooltipInSuw()
-                && mContext instanceof Activity
+        if (mContext instanceof Activity
                 && WizardManagerHelper.isAnySetupWizard(((Activity) mContext).getIntent())) {
             // Don't show QuickSettingsTooltip in Setup Wizard
             return;