Remove an unneeded helper from the tuple library code

[scottmcm]

Thanks to #107022, this is just what == does, so we don't need the helper here anymore.

[rustbot]

r? @joshtriplett

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[Noratrieb]

The old function talks about const stability, but == is not const. How does that work?

[scottmcm]

@Nilstrieb My guess would be that it's from when tuple Ord was marked const, but of course all those got yanked out.

[joshtriplett]

Let's make sure this implementation change doesn't have a performance impact:

@bors try @rust-timer queue

[joshtriplett]

r? libs

[bors]

⌛ Trying commit 4b3f115 with merge caf734b...

[bors]

☀️ Try build successful - checks-actions
Build commit: caf734b (caf734bb14e2d8f047cd0fcb1e8cae7d3ebb8c6d)

[rust-timer]

Finished benchmarking commit (caf734b): comparison URL.

Overall result: ✅ improvements - no action needed

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR may lead to changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -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
Improvements ✅ (primary)	-0.8%	[-0.8%, -0.8%]	1
Improvements ✅ (secondary)	-1.3%	[-1.3%, -1.3%]	1
All ❌✅ (primary)	-0.8%	[-0.8%, -0.8%]	1

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)	6.9%	[6.9%, 6.9%]	1
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	6.9%	[6.9%, 6.9%]	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.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.1%	[-1.1%, -1.1%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-1.1%	[-1.1%, -1.1%]	1

Binary size

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)	0.1%	[0.0%, 0.2%]	10
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-0.2%	[-0.3%, -0.0%]	2
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.1%	[-0.3%, 0.2%]	12

Bootstrap: 666.058s -> 663.617s (-0.37%)
Artifact size: 308.32 MiB -> 308.33 MiB (0.00%)

[joshtriplett]

@bors r+ rollup

[bors]

📌 Commit 4b3f115 has been approved by joshtriplett

It is now in the queue for this repository.