Remove header files that only have includes.

fpdfsdk/src/formfiller/FFL_ListBox.cpp

Index: fpdfsdk/src/formfiller/FFL_ListBox.cpp
diff --git a/fpdfsdk/src/formfiller/FFL_ListBox.cpp b/fpdfsdk/src/formfiller/FFL_ListBox.cpp
index d9244e699f568462b53f282ab2c1429ce0ad98bc..638618f78431ae3dc65c7c7ed90e984ac9c1e90c 100644
--- a/fpdfsdk/src/formfiller/FFL_ListBox.cpp
+++ b/fpdfsdk/src/formfiller/FFL_ListBox.cpp
@@ -4,17 +4,17 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "fpdfsdk/include/formfiller/FFL_ListBox.h"
+
 #include "fpdfsdk/include/formfiller/FFL_CBA_Fontmap.h"
 #include "fpdfsdk/include/formfiller/FFL_FormFiller.h"
 #include "fpdfsdk/include/formfiller/FFL_IFormFiller.h"
-#include "fpdfsdk/include/formfiller/FFL_ListBox.h"
-#include "fpdfsdk/include/formfiller/FormFiller.h"
+#include "fpdfsdk/include/fsdk_common.h"
+#include "fpdfsdk/include/fsdk_mgr.h"
+#include "fpdfsdk/include/pdfwindow/PWL_ListBox.h"
 
 #define FFL_DEFAULTLISTBOXFONTSIZE 12.0f
 
-/* ------------------------------- CFFL_ListBox -------------------------------
- */
-
 CFFL_ListBox::CFFL_ListBox(CPDFDoc_Environment* pApp, CPDFSDK_Annot* pWidget)
     : CFFL_FormFiller(pApp, pWidget), m_pFontMap(NULL) {}
 
@@ -213,8 +213,9 @@ CPWL_Wnd* CFFL_ListBox::ResetPDFWindow(CPDFSDK_PageView* pPageView,
   if (bRestoreValue) {
     RestoreState(pPageView);
     pRet = GetPDFWindow(pPageView, FALSE);
-  } else
+  } else {
     pRet = GetPDFWindow(pPageView, TRUE);
+  }
 
   m_pWidget->UpdateField();