Remove unnecessary includes of fx_system.h, part 3

Change-Id: I38a713f10674c09895cf6f78e76f2fb420581a47
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/83430
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/core/fpdfdoc/cpvt_variabletext.h b/core/fpdfdoc/cpvt_variabletext.h
index 65a3c4c..8c6b3b2 100644
--- a/core/fpdfdoc/cpvt_variabletext.h
+++ b/core/fpdfdoc/cpvt_variabletext.h
@@ -7,6 +7,8 @@
 #ifndef CORE_FPDFDOC_CPVT_VARIABLETEXT_H_
 #define CORE_FPDFDOC_CPVT_VARIABLETEXT_H_
 
+#include <stdint.h>
+
 #include <memory>
 #include <vector>
 
@@ -18,7 +20,6 @@
 #include "core/fxcrt/fx_codepage_forward.h"
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/fx_system.h"
 #include "core/fxcrt/unowned_ptr.h"
 
 class CPVT_Section;