Remove unnecessary uses of SR and symbolic functions in sage.categories, sage.coding #32413
Description
git grep -E '[.](symbolic|calculus|functions).*import' src/sage/coding reveals a number of calls to the symbolic calculus subsystem of Sage that can be avoided, similar to what is done in #32411
CC: @dimpase @fchapoton @tscrim
Component: refactoring
Author: Frédéric Chapoton
Branch/Commit: f96c696
Reviewer: Matthias Koeppe
Issue created by migration from https://trac.sagemath.org/ticket/32413