Cleanup some PWL_FontMap methods

fpdfsdk/pdfwindow/PWL_FontMap.cpp

Index: fpdfsdk/pdfwindow/PWL_FontMap.cpp
diff --git a/fpdfsdk/pdfwindow/PWL_FontMap.cpp b/fpdfsdk/pdfwindow/PWL_FontMap.cpp
index 96acb78ec2aa0538730af46e8dfd5d3701152b7e..3e2fc923e0c435c4c9f9cc4cd9e2e9d763039052 100644
--- a/fpdfsdk/pdfwindow/PWL_FontMap.cpp
+++ b/fpdfsdk/pdfwindow/PWL_FontMap.cpp
@@ -43,10 +43,6 @@ CPWL_FontMap::~CPWL_FontMap() {
   Empty();
 }
 
-void CPWL_FontMap::SetSystemHandler(CFX_SystemHandler* pSystemHandler) {
-  m_pSystemHandler = pSystemHandler;
-}
-
 CPDF_Document* CPWL_FontMap::GetDocument() {
   if (!m_pPDFDoc) {
     if (CPDF_ModuleMgr::Get()) {
@@ -484,13 +480,3 @@ int32_t CPWL_FontMap::CharSetFromUnicode(uint16_t word, int32_t nOldCharset) {
 
   return ANSI_CHARSET;
 }
-
-CPWL_DocFontMap::CPWL_DocFontMap(CFX_SystemHandler* pSystemHandler,
-                                 CPDF_Document* pAttachedDoc)
-    : CPWL_FontMap(pSystemHandler), m_pAttachedDoc(pAttachedDoc) {}
-
-CPWL_DocFontMap::~CPWL_DocFontMap() {}
-
-CPDF_Document* CPWL_DocFontMap::GetDocument() {
-  return m_pAttachedDoc;
-}