Drop stale TODO above triangular*homogeneous workaround

libeigen/eigen!2449

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>

Eigen/src/Geometry/Homogeneous.h

diff --git a/Eigen/src/Geometry/Homogeneous.h b/Eigen/src/Geometry/Homogeneous.h
index b304b67..22361e9 100644
--- a/Eigen/src/Geometry/Homogeneous.h
+++ b/Eigen/src/Geometry/Homogeneous.h
@@ -392,7 +392,6 @@
   }
 };
 
-// TODO: this specialization addresses a performance regression from 3.2 to 3.3; optimize this path.
 template <typename Lhs, typename RhsArg, int ProductTag>
 struct generic_product_impl<Lhs, Homogeneous<RhsArg, Vertical>, TriangularShape, HomogeneousShape, ProductTag> {
   template <typename Dest>