chore(Analysis/InnerProductSpace): remove misleading comment

[felixpernegger]

The comment makes no sense any more: noncomputable section checks first if a def is computable, and only if not, makes it noncomputable. So noncomputable section wouldn't make a difference here (for an example where noncomputable def vs noncomputable section makes a difference see #mathlib4 > noncomputable section @ 💬).

Looking at the git history, it used to be marked noncomputable def, but that was removed in #40091 without comment. This is not a performance issue any more, so the comment can just be removed.

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(I stumbled about this while reviewing #42122)

[github-actions]

PR summary d287a74723

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff (regex)

No declarations were harmed in the making of this PR! 🐙

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)

✅ Lean-aware diff — post-build, computed from the Lean environment (commit d287a74).

• +0 new declarations
• −0 removed declarations

No declaration differences.

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No changes to strong technical debt.

No changes to weak technical debt.

Current commit d287a74723
Reference commit 7779d601f7

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.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).

[mcdoll]

LGTM, thanks!
maintainer merge

[github-actions]

🚀 Pull request has been placed on the maintainer queue by mcdoll.

[grunweg]

I tweaked the PR description quite a bit - LGTM now. Thanks!
bors merge

[felixpernegger]

@grunweg bors bugged