Used DISPATCH_FLOAT_INT_DTYPE_TO_TEMPLATE macro.

Instead of using if statements explicitly, used DISPATCH_FLOAT_INT_DTYPE_TO_TEMPLATE
to dispatch to RemoveDuplicateVerticesWorker function appropriately.

On branch sganjugu/remdup2
Your branch is up to date with 'origin/sganjugu/remdup2'.
Changes to be committed:
modified:   ../cpp/open3d/t/geometry/TriangleMesh.cpp

cpp/open3d/t/geometry/TriangleMesh.cpp

@@ -1383,19 +1383,10 @@ TriangleMesh &TriangleMesh::RemoveDuplicateVertices() {
         return *this;
     }
 
-    if (core::Float32 == vertices.GetDtype()) {
-        if (core::Int32 == triangle_dtype) {
-            return RemoveDuplicateVerticesWorker<float, int>(*this);
-        } else {
-            return RemoveDuplicateVerticesWorker<float, int64_t>(*this);
-        }
-    } else {
-        if (core::Int32 == triangle_dtype) {
-            return RemoveDuplicateVerticesWorker<double, int>(*this);
-        } else {
-            return RemoveDuplicateVerticesWorker<double, int64_t>(*this);
-        }
-    }
+    DISPATCH_FLOAT_INT_DTYPE_TO_TEMPLATE(
+            vertices.GetDtype(), triangle_dtype,
+            [&]() { RemoveDuplicateVerticesWorker<scalar_t, int_t>(*this); });
+    return *this;
 }
 
 }  // namespace geometry