Clean up QRCoderEncoder and friends.

Remove a bunch of unused code, including gotos.
Fix some potential memory leaks.

Change-Id: Ia2775e2ab176f4741b765e259a24a293a5717394
Reviewed-on: https://pdfium-review.googlesource.com/3560
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/xfa/fwl/cfwl_barcode.h b/xfa/fwl/cfwl_barcode.h
index 463c0a2..ce62d73 100644
--- a/xfa/fwl/cfwl_barcode.h
+++ b/xfa/fwl/cfwl_barcode.h
@@ -33,9 +33,8 @@
   FWL_BCDATTRIBUTE_WIDENARROWRATIO = 1 << 7,
   FWL_BCDATTRIBUTE_STARTCHAR = 1 << 8,
   FWL_BCDATTRIBUTE_ENDCHAR = 1 << 9,
-  FWL_BCDATTRIBUTE_VERSION = 1 << 10,
-  FWL_BCDATTRIBUTE_ECLEVEL = 1 << 11,
-  FWL_BCDATTRIBUTE_TRUNCATED = 1 << 12
+  FWL_BCDATTRIBUTE_ECLEVEL = 1 << 10,
+  FWL_BCDATTRIBUTE_TRUNCATED = 1 << 11,
 };
 
 class CFWL_Barcode : public CFWL_Edit {