Revert "SystemUI: Fix expanded QS clock color"

This reverts commit c748475.

Author: hungphan2001

packages/SystemUI/res/layout/quick_status_bar_header_date_privacy.xml

@@ -46,7 +46,6 @@
             android:textAppearance="@style/TextAppearance.QS.Status"
             systemui:longDatePattern="@string/abbrev_wday_month_day_no_year_alarm"
             systemui:shortDatePattern="@string/abbrev_month_day_no_year"
-            systemui:showDark="false"
         />
     </FrameLayout>