Remove dead diagnostic code for generators

[cjgillot]

This code has become unreachable with #107421.

[rustbot]

r? @davidtwco

(rustbot has picked a reviewer for you, use r? to override)

[rustbot]

This PR changes Stable MIR

cc @oli-obk, @celinval, @spastorino

Some changes occurred to the core trait solver

cc @rust-lang/initiative-trait-system-refactor

[rustbot]

Some changes occurred to the core trait solver

cc @rust-lang/initiative-trait-system-refactor

This PR changes Stable MIR

cc @oli-obk, @celinval, @spastorino

[compiler-errors]

r? @compiler-errors @bors r+

[bors]

📌 Commit 26cb34c has been approved by compiler-errors

It is now in the queue for this repository.

[bors]

⌛ Testing commit 26cb34c with merge 91958e0...

[bors]

☀️ Test successful - checks-actions
Approved by: compiler-errors
Pushing 91958e0 to master...

[rust-timer]

Finished benchmarking commit (91958e0): 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)	1.0%	[1.0%, 1.0%]	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)	1.3%	[1.3%, 1.3%]	1
Regressions ❌ (secondary)	1.4%	[0.6%, 4.1%]	6
Improvements ✅ (primary)	-3.3%	[-4.5%, -1.2%]	5
Improvements ✅ (secondary)	-5.4%	[-7.6%, -3.1%]	4
All ❌✅ (primary)	-2.5%	[-4.5%, 1.3%]	6

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: 631.113s -> 631.523s (0.06%)
Artifact size: 317.17 MiB -> 317.27 MiB (0.03%)