diff --git a/fpdfsdk/fpdfview.cpp b/fpdfsdk/fpdfview.cpp
index 3ab81fe..e0c24ec 100644
--- a/fpdfsdk/fpdfview.cpp
+++ b/fpdfsdk/fpdfview.cpp
@@ -175,44 +175,8 @@
 }
 #endif  // PDF_ENABLE_XFA
 
-CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess) {
-  m_FileAccess = *pFileAccess;
-#ifdef PDF_ENABLE_XFA
-  m_BufferOffset = (uint32_t)-1;
-#endif  // PDF_ENABLE_XFA
-}
-
-#ifdef PDF_ENABLE_XFA
-CFX_ByteString CPDF_CustomAccess::GetFullPath() {
-  return "";
-}
-
-FX_BOOL CPDF_CustomAccess::GetByte(uint32_t pos, uint8_t& ch) {
-  if (pos >= m_FileAccess.m_FileLen)
-    return FALSE;
-  if (m_BufferOffset == (uint32_t)-1 || pos < m_BufferOffset ||
-      pos >= m_BufferOffset + 512) {
-    // Need to read from file access
-    m_BufferOffset = pos;
-    int size = 512;
-    if (pos + 512 > m_FileAccess.m_FileLen)
-      size = m_FileAccess.m_FileLen - pos;
-    if (!m_FileAccess.m_GetBlock(m_FileAccess.m_Param, m_BufferOffset, m_Buffer,
-                                 size))
-      return FALSE;
-  }
-  ch = m_Buffer[pos - m_BufferOffset];
-  return TRUE;
-}
-
-FX_BOOL CPDF_CustomAccess::GetBlock(uint32_t pos,
-                                    uint8_t* pBuf,
-                                    uint32_t size) {
-  if (pos + size > m_FileAccess.m_FileLen)
-    return FALSE;
-  return m_FileAccess.m_GetBlock(m_FileAccess.m_Param, pos, pBuf, size);
-}
-#endif  // PDF_ENABLE_XFA
+CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
+    : m_FileAccess(*pFileAccess) {}
 
 FX_FILESIZE CPDF_CustomAccess::GetSize() {
   return m_FileAccess.m_FileLen;
diff --git a/fpdfsdk/fsdk_define.h b/fpdfsdk/fsdk_define.h
index 372ceb3..b59a3c2 100644
--- a/fpdfsdk/fsdk_define.h
+++ b/fpdfsdk/fsdk_define.h
@@ -35,18 +35,8 @@
   void Release() override;
   FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
 
-#ifdef PDF_ENABLE_XFA
-  virtual CFX_ByteString GetFullPath();
-  virtual FX_BOOL GetByte(uint32_t pos, uint8_t& ch);
-  virtual FX_BOOL GetBlock(uint32_t pos, uint8_t* pBuf, uint32_t size);
-#endif  // PDF_ENABLE_XFA
-
  private:
   FPDF_FILEACCESS m_FileAccess;
-#ifdef PDF_ENABLE_XFA
-  uint8_t m_Buffer[512];
-  uint32_t m_BufferOffset;
-#endif  // PDF_ENABLE_XFA
 };
 
 #ifdef PDF_ENABLE_XFA