Polyhedron_base.vertex_adjacency_matrix: Do not use face_lattice #32666
Description
instead just go through self.combinatorial_polyhedron().edges()
This should be faster - and only avoids an indirect dependency of sage.geometry.polyhedron.plot on sage.combinat
CC: @kliem
Component: geometry
Author: Jonathan Kliem
Branch/Commit: 2cd253c
Reviewer: Frédéric Chapoton, Matthias Koeppe
Issue created by migration from https://trac.sagemath.org/ticket/32666