Clippy pre beta branch fix

[flip1995]

Before beta is branched on Friday, I want to move the unused_peekable lint that was added in this release cycle (1.65) to nursery. This lint was already reported twice (rust-lang/rust-clippy#9456, rust-lang/rust-clippy#9462) in a short time, so it is probably a good idea to fix it before it hits beta and then stable.

r? @Manishearth

[rustbot]

Some changes occurred in src/tools/clippy

cc @rust-lang/clippy

[Manishearth]

@bors r+ p=1

[bors]

📌 Commit c5cbc777afb829674d6247a07650091e99bf6ab7 has been approved by Manishearth

It is now in the queue for this repository.

[trinity-1686a]

fwiw, I think I found another FP for the same lint rust-lang/rust-clippy#9480

[bors]

⌛ Testing commit c5cbc777afb829674d6247a07650091e99bf6ab7 with merge 76281daa0a646c6f8861f75885d4a8efc288b354...

[flip1995]

@bors r- retry

I think I just move it to nursery for this release then.

[flip1995]

Done! Let's let the fixes ride the release train 🚂

[flip1995]

Approving myself to get it in before tomorrow.

@bors r+

[bors]

📌 Commit fd29148 has been approved by flip1995

It is now in the queue for this repository.

[bors]

⌛ Testing commit fd29148 with merge 00fcc82...

[bors]

☀️ Test successful - checks-actions
Approved by: flip1995
Pushing 00fcc82 to master...

[rust-timer]

Finished benchmarking commit (00fcc82): comparison URL.

Overall result: ❌ regressions - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.4%	[2.4%, 2.4%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

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.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.9%	[-0.9%, -0.9%]	1
Improvements ✅ (secondary)	-3.7%	[-6.8%, -1.5%]	5
All ❌✅ (primary)	-0.9%	[-0.9%, -0.9%]	1

Cycles

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.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.8%	[2.8%, 2.8%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Footnotes

1. the arithmetic mean of the percent change ↩ ↩² ↩³

2. number of relevant changes ↩ ↩² ↩³