Remove unused header from cpdfxfa_context.cpp.

In turn, this removes a dependence between fpdfsdk/fpdfxa and xfa/fgas.

Change-Id: I5107247dc14af2a51e2ee72c9818abceda7f37b6
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/58553
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/fpdfxfa/BUILD.gn b/fpdfsdk/fpdfxfa/BUILD.gn
index a3025a6..936da68 100644
--- a/fpdfsdk/fpdfxfa/BUILD.gn
+++ b/fpdfsdk/fpdfxfa/BUILD.gn
@@ -26,7 +26,6 @@
     "../../core/fpdfapi/render",
     "../../core/fxcrt",
     "../../fxjs",
-    "../../xfa/fgas",
     "../../xfa/fwl",
     "../../xfa/fxfa",
     "../../xfa/fxfa/parser",
diff --git a/fpdfsdk/fpdfxfa/cpdfxfa_context.cpp b/fpdfsdk/fpdfxfa/cpdfxfa_context.cpp
index 8af985f..ca168ab 100644
--- a/fpdfsdk/fpdfxfa/cpdfxfa_context.cpp
+++ b/fpdfsdk/fpdfxfa/cpdfxfa_context.cpp
@@ -20,7 +20,6 @@
 #include "public/fpdf_formfill.h"
 #include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
-#include "xfa/fgas/font/cfgas_defaultfontmanager.h"
 #include "xfa/fxfa/cxfa_eventparam.h"
 #include "xfa/fxfa/cxfa_ffapp.h"
 #include "xfa/fxfa/cxfa_ffdoc.h"