Remove unused method CPDF_Bookmark::GetColorRef.

Change-Id: I8ad38892eda7c820189924d53dacbb4c5a720e8b
Reviewed-on: https://pdfium-review.googlesource.com/c/43458
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>

core/fpdfdoc/cpdf_bookmark.cpp

diff --git a/core/fpdfdoc/cpdf_bookmark.cpp b/core/fpdfdoc/cpdf_bookmark.cpp
index 89dbbf8..3439843 100644
--- a/core/fpdfdoc/cpdf_bookmark.cpp
+++ b/core/fpdfdoc/cpdf_bookmark.cpp
@@ -14,33 +14,13 @@
 #include "core/fpdfdoc/cpdf_nametree.h"
 #include "core/fxge/fx_dib.h"
 
-namespace {
-
-constexpr uint32_t kBlackBGR = FXSYS_BGR(0, 0, 0);
-
-}  // namespace
-
-CPDF_Bookmark::CPDF_Bookmark() {}
+CPDF_Bookmark::CPDF_Bookmark() = default;
 
 CPDF_Bookmark::CPDF_Bookmark(const CPDF_Bookmark& that) = default;
 
 CPDF_Bookmark::CPDF_Bookmark(const CPDF_Dictionary* pDict) : m_pDict(pDict) {}
 
-CPDF_Bookmark::~CPDF_Bookmark() {}
-
-uint32_t CPDF_Bookmark::GetColorRef() const {
-  if (!m_pDict)
-    return kBlackBGR;
-
-  const CPDF_Array* pColor = m_pDict->GetArrayFor("C");
-  if (!pColor)
-    return kBlackBGR;
-
-  int r = FXSYS_round(pColor->GetNumberAt(0) * 255);
-  int g = FXSYS_round(pColor->GetNumberAt(1) * 255);
-  int b = FXSYS_round(pColor->GetNumberAt(2) * 255);
-  return FXSYS_BGR(b, g, r);
-}
+CPDF_Bookmark::~CPDF_Bookmark() = default;
 
 uint32_t CPDF_Bookmark::GetFontStyle() const {
   return m_pDict ? m_pDict->GetIntegerFor("F") : 0;

core/fpdfdoc/cpdf_bookmark.h

diff --git a/core/fpdfdoc/cpdf_bookmark.h b/core/fpdfdoc/cpdf_bookmark.h
index ff31af1..47fd071 100644
--- a/core/fpdfdoc/cpdf_bookmark.h
+++ b/core/fpdfdoc/cpdf_bookmark.h
@@ -23,7 +23,6 @@
   ~CPDF_Bookmark();
 
   const CPDF_Dictionary* GetDict() const { return m_pDict.Get(); }
-  uint32_t GetColorRef() const;
   uint32_t GetFontStyle() const;
   WideString GetTitle() const;
   CPDF_Dest GetDest(CPDF_Document* pDocument) const;