Remove deprecated code in geometry

[novoselt]

Remove stuff deprecated in #16180, #19070 and #19071.

Also some code clean up like removing unused variables, imports, and stale commented code.

CC: @vbraun

Component: geometry

Author: Andrey Novoseltsev

Branch/Commit: 4599dcc

Reviewer: Julian Rüth

Issue created by migration from https://trac.sagemath.org/ticket/22122

[novoselt]

Description changed:

--- 
+++ 
@@ -1 +1,3 @@
-Remove stuff deprecated in #16180 and #19071
+Remove stuff deprecated in #16180, #19070 and #19071.
+
+Also some code clean up like removing unused variables, imports, and stale commented code.

[novoselt]

Branch: u/novoselt/22122

[novoselt]

New commits:

4599dcc

Remove old-style faces of lattice polytopes

[novoselt]

Commit: 4599dcc

[saraedum]

Reviewer: Julian Rüth

[saraedum]

comment:4

Feel free to set this to positive review if you think that the patchbot error is unrelated.

[novoselt]

comment:5

I do think that they are unrelated, and they are different for beta0 and beta1. Thank you for taking a look!

[vbraun]

Changed branch from u/novoselt/22122 to 4599dcc