Remove unused methods in CPDF_CMap

core/fpdfapi/fpdf_font/fpdf_font_cid.cpp

Index: core/fpdfapi/fpdf_font/fpdf_font_cid.cpp
diff --git a/core/fpdfapi/fpdf_font/fpdf_font_cid.cpp b/core/fpdfapi/fpdf_font/fpdf_font_cid.cpp
index cfcac364b9591d00a67b7d28bae60839b0f0915d..d8cada7af31bbe6f077f83f96696693088a1fdab 100644
--- a/core/fpdfapi/fpdf_font/fpdf_font_cid.cpp
+++ b/core/fpdfapi/fpdf_font/fpdf_font_cid.cpp
@@ -518,11 +518,6 @@ CPDF_CMap::~CPDF_CMap() {
   FX_Free(m_pAddMapping);
   FX_Free(m_pLeadingBytes);
 }
-void CPDF_CMap::Release() {
-  if (m_PredefinedCMap.IsEmpty()) {
-    delete this;
-  }
-}
 
 FX_BOOL CPDF_CMap::IsLoaded() const {
   return m_bLoaded;