Remove dead code in CJpegContext.

Change-Id: Id88bb32ea822ab5f3f36e119723df00cb266dd8f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/73012
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/core/fxcodec/jpeg/jpeg_progressive_decoder.cpp b/core/fxcodec/jpeg/jpeg_progressive_decoder.cpp
index 1dd466a..80bbe18 100644
--- a/core/fxcodec/jpeg/jpeg_progressive_decoder.cpp
+++ b/core/fxcodec/jpeg/jpeg_progressive_decoder.cpp
@@ -32,8 +32,6 @@
   jpeg_error_mgr m_ErrMgr = {};
   jpeg_source_mgr m_SrcMgr = {};
   unsigned int m_SkipSize = 0;
-  void* (*m_AllocFunc)(unsigned int);
-  void (*m_FreeFunc)(void*);
 };
 
 extern "C" {
@@ -54,14 +52,6 @@
   }
 }
 
-static void* jpeg_alloc_func(unsigned int size) {
-  return FX_Alloc(char, size);
-}
-
-static void jpeg_free_func(void* p) {
-  FX_Free(p);
-}
-
 }  // extern "C"
 
 static void JpegLoadAttribute(const jpeg_decompress_struct& info,
@@ -71,8 +61,7 @@
   pAttribute->m_wDPIUnit = info.density_unit;
 }
 
-CJpegContext::CJpegContext()
-    : m_AllocFunc(jpeg_alloc_func), m_FreeFunc(jpeg_free_func) {
+CJpegContext::CJpegContext() {
   m_Info.client_data = this;
   m_Info.err = &m_ErrMgr;