[Merged by Bors] - chore(MeasureTheory/Function/ConditionalExpectation): remove unneeded lpMeasSubgroup_coe and lpMeas_coe

[JovanGerb]

I don't know since when, but these rewrite lemmas hold syntactically (up to proof irrelevance). This was flagged by the linter in the testing branch #22177.

---

[github-actions]

PR summary a11684cb41

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

---

Declarations diff

- lpMeasSubgroup_coe
- lpMeas_coe

You can run this locally as follows

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

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

---

No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh 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).

[RemyDegenne]

Thanks!
bors r+

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

• Lint style
• Build