Remove stray include from fxjs/cjs_object.h

It is not needed, and is circular anyways.

Change-Id: I14a30c86aebd03398518d79a3063d8f55f462829
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/55850
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/fxjs/cjs_object.h b/fxjs/cjs_object.h
index 2bb08fe..791d589 100644
--- a/fxjs/cjs_object.h
+++ b/fxjs/cjs_object.h
@@ -8,7 +8,6 @@
 #define FXJS_CJS_OBJECT_H_
 
 #include "core/fxcrt/unowned_ptr.h"
-#include "fpdfsdk/cpdfsdk_helpers.h"
 #include "fxjs/cjs_runtime.h"
 #include "third_party/base/span.h"