Remove unneeded [const] Destruct bound in array::from_fn

[Lars-Schumann]

relevant tracking issue: #147606

Using array::try_from_fn introduces an unneeded T: [const] Destruct bound.

Given that try_from_fn internally uses try_from_fn_erased, this change could have negative perf implications.

[Lars-Schumann]

@bors retry

[rust-bors]

@Lars-Schumann: 🔑 Insufficient privileges: not in review users

[panstromek]

@bors retry

[rust-bors]

@panstromek: 🔑 Insufficient privileges: not in review users

[panstromek]

I think you'll have to re-push to rerun CI, but we can run try at least. Do you also need perf run?

@bors try

[rust-bors]

☀️ Try build successful (CI)
Build commit: a98450b (a98450ba9dafb1bf4ac77cc63b1dc64bca93429b)
Base parent: 6660e28 (6660e286ea36304054d6ca5264f5392513622b66)

[rust-log-analyzer]

The job pr-check-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

failures:

---- iter::adapters::map_windows::drop_checks::panicking_clone stdout ----

thread 'iter::adapters::map_windows::drop_checks::panicking_clone' (42823) panicked at library/coretests/tests/iter/adapters/map_windows.rs:158:21:
⚞(· <:::> ·)⚟ aaaaaah its the turbofish monster!!! its gonna eat us all!!!1!

thread 'iter::adapters::map_windows::drop_checks::panicking_clone' (42823) panicked at library/coretests/tests/iter/adapters/map_windows.rs:189:9:
assertion `left == right` failed
  left: 0
 right: 3

[Lars-Schumann]

I didn't think about panic safety here, seems like the bound is needed after all.