removed from __future__ import in pyx files

Author: Jonathan Kliem

src/sage/geometry/polyhedron/combinatorial_polyhedron/base.pyx

@@ -83,7 +83,6 @@ AUTHOR:
 #                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
-from __future__                     import absolute_import, division, print_function
 import numbers
 from sage.rings.integer             import Integer
 from sage.graphs.graph              import Graph

src/sage/geometry/polyhedron/combinatorial_polyhedron/combinatorial_face.pyx

@@ -64,7 +64,6 @@ AUTHOR:
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
 
-from __future__                  import absolute_import, division, print_function
 from sage.misc.superseded        import deprecated_function_alias
 
 import numbers

src/sage/geometry/polyhedron/combinatorial_polyhedron/conversions.pyx

@@ -66,7 +66,6 @@ AUTHOR:
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
 
-from __future__             import absolute_import, division
 from sage.structure.element import is_Matrix
 
 from libc.string            cimport memset

src/sage/geometry/polyhedron/combinatorial_polyhedron/list_of_faces.pyx

@@ -80,7 +80,6 @@ AUTHOR:
 #                  http://www.gnu.org/licenses/
 #*****************************************************************************
 
-from __future__             import absolute_import, division
 from sage.structure.element import is_Matrix
 
 from cysignals.signals      cimport sig_on, sig_off