backend_polymake: Clean up imports

[mkoeppe]

Following up on #22683 comment 13,
we remove redundant import statements from backend_polymake.

CC: @kiwifb @tscrim

Component: geometry

Author: Matthias Koeppe

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/22740

[mkoeppe]

Branch: u/mkoeppe/backend_polymake__clean_up_imports

[mkoeppe]

Last 10 new commits:

ef23af4	Polyhedron_base._polymake_init_: Add test for RDF polyhedra
205879f	Matrix, MatrixSpace: Add coercion to polymake interface
e49765e	Polymake: Fix tests whose error messages changed because we do not use files
51af468	PolymakeElement.__iter__: New
2f0e059	PolymakeElement._sage_: Implement for *Vector, *Matrix, QuadraticExtension
218daca	Add Polyhedron_polymake
5ab94a2	Merge tag '7.6' into t/22683/backend_polymake_for_polyhedron
8fd81c7	Polyhedron_polymake._polymake_: Add doctest
952b860	PolymakeElement.__iter__: Doc fixes
5eee110	backend_polymake: Clean up imports

[mkoeppe]

Commit: 5eee110

[mkoeppe]

Author: Matthias Koeppe

[tscrim]

Reviewer: Travis Scrimshaw

[mkoeppe]

comment:4

I've made this change part of #22740 now. Marking this as duplicate.

[tscrim]

Changed commit from 5eee110 to none

[tscrim]

Changed dependencies from #22683 to none

[tscrim]

Changed branch from u/mkoeppe/backend_polymake__clean_up_imports to none

[embray]

comment:6

Closing tickets in the sage-duplicate/invalid/wontfix module with positive_review (i.e. someone has confirmed they should be closed).