Remove unnecessary includes of fx_system.h, part 5

Change-Id: I1f5f8e48168d9eb8540094d050987e8423f4a56b
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/83492
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/fxbarcode/cbc_qrcode.h b/fxbarcode/cbc_qrcode.h
index f257417..a015858 100644
--- a/fxbarcode/cbc_qrcode.h
+++ b/fxbarcode/cbc_qrcode.h
@@ -8,10 +8,11 @@
 #define FXBARCODE_CBC_QRCODE_H_
 
 #include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/fx_system.h"
 #include "fxbarcode/cbc_codebase.h"
 
 class CBC_QRCodeWriter;
+class CFX_Matrix;
+class CFX_RenderDevice;
 
 class CBC_QRCode final : public CBC_CodeBase {
  public: