Cleanup unneeded FWL theme code.

xfa/fwl/theme/cfwl_monthcalendartp.cpp

Index: xfa/fwl/theme/cfwl_monthcalendartp.cpp
diff --git a/xfa/fwl/theme/cfwl_monthcalendartp.cpp b/xfa/fwl/theme/cfwl_monthcalendartp.cpp
index eee199ee6dea7c9adf75c9a160e2139d1ac1bbcc..3cbe007b5f17dbd86edacac84003d3f631167ecb 100644
--- a/xfa/fwl/theme/cfwl_monthcalendartp.cpp
+++ b/xfa/fwl/theme/cfwl_monthcalendartp.cpp
@@ -60,12 +60,10 @@ bool CFWL_MonthCalendarTP::IsValidWidget(IFWL_Widget* pWidget) {
 }
 
 uint32_t CFWL_MonthCalendarTP::SetThemeID(IFWL_Widget* pWidget,
-                                          uint32_t dwThemeID,
-                                          FX_BOOL bChildren) {
+                                          uint32_t dwThemeID) {
   if (m_pThemeData)
     SetThemeData(FWL_GetThemeColor(dwThemeID));
-
-  return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID, bChildren);
+  return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID);
 }
 
 FX_BOOL CFWL_MonthCalendarTP::DrawBackground(CFWL_ThemeBackground* pParams) {