Remove redundant example of BTreeSet::iter

[zica87]

The usage and that Values returned by the iterator are returned in ascending order are already demonstrated by the other example and the description, so I removed the useless one.

[rustbot]

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[workingjubilee]

Yup, that seems fully repetitive. Good catch!

@bors r+ rollup

[bors]

📌 Commit 5a6400b has been approved by workingjubilee

It is now in the queue for this repository.

[bors]

⌛ Testing commit 5a6400b with merge 2e0136a...

[bors]

☀️ Test successful - checks-actions
Approved by: workingjubilee
Pushing 2e0136a to master...

[rust-timer]

Finished benchmarking commit (2e0136a): 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.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.3%	[0.3%, 0.3%]	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.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.4%	[-3.1%, -0.6%]	13
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.4%	[-3.1%, -0.6%]	13

Cycles

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

Binary size

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

Bootstrap: 649.757s -> 651.209s (0.22%)