Check guards before calling deduplication functions

DeduplicateAttributeValues and DeduplicatePointIds do not
exist in Draco builds that have attribute deduplication
disabled. So, we need to avoid calling these functions
if the feature macro is not present.

Fixes PixarAnimationStudios#1671

(Internal change: 2211625)

pxr/usd/plugin/usdDraco/exportTranslator.cpp

@@ -31,12 +31,11 @@
 #include "pxr/usd/usdGeom/mesh.h"
 #include "pxr/base/vt/types.h"
 
+#include <draco/core/macros.h>
 #include <draco/mesh/mesh.h>
 
-
 PXR_NAMESPACE_OPEN_SCOPE
 
-
 bool UsdDracoExportTranslator::Translate(
         const UsdGeomMesh &usdMesh,
         draco::Mesh *dracoMesh,
@@ -365,9 +364,14 @@ void UsdDracoExportTranslator::_SetPointMapsToMesh() {
 }
 
 void UsdDracoExportTranslator::_Deduplicate() const {
+#ifdef DRACO_ATTRIBUTE_VALUES_DEDUPLICATION_SUPPORTED
     if (!_posOrder.HasPointAttribute())
         _dracoMesh->DeduplicateAttributeValues();
+#endif
+
+#ifdef DRACO_ATTRIBUTE_INDICES_DEDUPLICATION_SUPPORTED
     _dracoMesh->DeduplicatePointIds();
+#endif
 }
 
 // Polygon reconstruction attribute is associated with every triangle corner and
@@ -408,5 +412,4 @@ inline bool UsdDracoExportTranslator::_IsNewEdge(
     return triIndex != triCount - 1 && triCorner == 1;
 }
 
-
 PXR_NAMESPACE_CLOSE_SCOPE