Remove a couple of #[doc(hidden)] pub fn and their #[feature] gates

[tbu-]

No description provided.

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @scottmcm (or someone else) soon.

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[rustbot]

Hey! It looks like you've submitted a new PR for the library teams!

If this PR contains changes to any rust-lang/rust public library APIs then please comment with @rustbot label +T-libs-api -T-libs to tag it appropriately. If this PR contains changes to any unstable APIs please edit the PR description to add a link to the relevant API Change Proposal or create one if you haven't already. If you're unsure where your change falls no worries, just leave it as is and the reviewer will take a look and make a decision to forward on if necessary.

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[bors]

☔ The latest upstream changes (presumably #107828) made this pull request unmergeable. Please resolve the merge conflicts.

[scottmcm]

nit: in future, please try to keep things in a relative order such that things like this type don't show as delete-then-add in the diff.

[tbu-]

Sorry. Not sure why I did this.

[scottmcm]

Thanks! Cleaning these up to just be the Error trait method directly makes sense to me.

@bors r+ rollup=iffy (should be fine, but cfg(no_fp_fmt_parse) stuff always scares me a bit since the PR checks don't build that)

[bors]

📌 Commit 77c85e9 has been approved by scottmcm

It is now in the queue for this repository.

[bors]

⌛ Testing commit 77c85e9 with merge d094016...

[bors]

☀️ Test successful - checks-actions
Approved by: scottmcm
Pushing d094016 to master...

[bors]

☀️ Test successful - checks-actions
Approved by: scottmcm
Pushing d094016 to master...

[rust-timer]

Finished benchmarking commit (d094016): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.4%	[1.4%, 1.4%]	1
Regressions ❌ (secondary)	2.9%	[2.2%, 3.7%]	4
Improvements ✅ (primary)	-2.4%	[-3.7%, -1.2%]	2
Improvements ✅ (secondary)	-1.7%	[-1.7%, -1.7%]	1
All ❌✅ (primary)	-1.2%	[-3.7%, 1.4%]	3

Cycles

This benchmark run did not return any relevant results for this metric.