fixed pyflakes warnings

src/sage/geometry/polyhedron/base.py

@@ -5193,9 +5193,6 @@ def barycentric_subdivision(self, subdivision_frac=None):
         barycenter = self.center()
         parent = self.parent().base_extend(subdivision_frac)
 
-        ambient_dim = self.ambient_dim()
-        polytope_dim = self.dimension()
-
         start_polar = (self - barycenter).polar(in_affine_span=True)
         polar = (self - barycenter).polar(in_affine_span=True)
 
@@ -5381,7 +5378,7 @@ def hasse_diagram(self):
             sage: D.degree_polynomial()
             x^5 + x^4*y + x*y^4 + y^5 + 4*x^3*y + 8*x^2*y^2 + 4*x*y^3
         """
-        from sage.geometry.polyhedron.face import combinatorial_face_to_polyhedral_face, PolyhedronFace
+        from sage.geometry.polyhedron.face import combinatorial_face_to_polyhedral_face
         C = self.combinatorial_polyhedron()
         D = C.hasse_diagram()