chore(LinearMap/Defs): misc minor clean-up

[grunweg]

---

• depends on: [Merged by Bors] - chore: rename SemilinearMapClass.semilinearMap to LinearMap.ofClass #43376

[github-actions]

PR summary b08917227c

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

Declarations diff (regex)

+ SemilinearMapClass.semilinearMap
+ _root_.SemilinearMap.ofClass
+ coe_ofClass
+ ofClass_eq_toLinearMap
+ ofClass_injective
+ toLinearMap_eq_ofClass
- semilinearMap

You can run this locally as follows

## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

## summary with just the declaration names:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.

Declarations diff (Lean -- pending)

Computed after the build finishes.

---

No changes to strong technical debt.
No changes to weak technical debt.

Current commit b08917227c
Reference commit a4d9f2fdd2

This script lives in the mathlib-ci repository. To run it locally, from your mathlib4 directory:

git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci
../mathlib-ci/scripts/reporting/technical-debt-metrics.py pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[github-actions]

✅ PR Title Formatted Correctly

The title of this PR has been updated to match our commit style conventions.
Thank you!

[mathlib-dependent-issues]

This PR/issue depends on:

• [Merged by Bors] - chore: rename SemilinearMapClass.semilinearMap to LinearMap.ofClass #43376
  By Dependent Issues (🤖). Happy coding!