src/sage/geometry/polyhedron/base{3,6}.py: Muffle pyflakes warnings about unused imports

Author: Matthias Koeppe

src/sage/geometry/polyhedron/base3.py

@@ -1863,6 +1863,7 @@ def _test_combinatorial_face_as_combinatorial_polyhedron(self, tester=None, **op
             D2._test_bitsets(tester, **options)
             try:
                 import sage.graphs.graph
+                assert sage.graphs.graph  # to muffle pyflakes
             except ImportError:
                 pass
             else:

src/sage/geometry/polyhedron/base6.py

@@ -699,6 +699,7 @@ def _test_gale_transform(self, tester=None, **options):
 
             try:
                 import sage.graphs.graph
+                assert sage.graphs.graph  # to muffle pyflakes
             except ImportError:
                 pass
             else: