Remove ununused startAngle and sweepAngle variables

Neither of these local values ever get read after calculating them.

Issue found with Clang Static Analyzer.

Change-Id: Iffa578f1d5e303c65a881bcd372a9144a11edd3b
Reviewed-on: https://pdfium-review.googlesource.com/33532
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
diff --git a/xfa/fxfa/parser/cxfa_box.cpp b/xfa/fxfa/parser/cxfa_box.cpp
index 673b77d..16037d7 100644
--- a/xfa/fxfa/parser/cxfa_box.cpp
+++ b/xfa/fxfa/parser/cxfa_box.cpp
@@ -324,10 +324,6 @@
   rtWidget.width = a + a;
   rtWidget.height = b + b;
 
-  float startAngle = 0, sweepAngle = 360;
-  startAngle = startAngle * FX_PI / 180.0f;
-  sweepAngle = -sweepAngle * FX_PI / 180.0f;
-
   CXFA_GEPath arcPath;
   arcPath.AddArc(rtWidget.TopLeft(), rtWidget.Size(), 3.0f * FX_PI / 4.0f,
                  FX_PI);