…r-errors

remove duplicate test

This was added in rust-lang@ace6fc3 where overflowing-rsh-6 differed from overflowing-rsh-5 in a feature gate, but the feature has since been stabilized, making the tests 100% identical.

Most of these tests in numbers-arithmetic could be put into one file rather than having so many files that all test the same lint... but it doesn't seem worth the effort. After rust-lang#119432 we might be able to remove most of them entirely as they will be covered by the new tests added there.

…mpiler-errors

Rollup of 9 pull requests

Successful merges:

 - rust-lang#119208 (coverage: Hoist some complex code out of the main span refinement loop)
 - rust-lang#119216 (Use diagnostic namespace in stdlib)
 - rust-lang#119414 (bootstrap: Move -Clto= setting from Rustc::run to rustc_cargo)
 - rust-lang#119420 (Handle ForeignItem as TAIT scope.)
 - rust-lang#119468 (rustdoc-search: tighter encoding for f index)
 - rust-lang#119628 (remove duplicate test)
 - rust-lang#119638 (fix cyle error when suggesting to use associated function instead of constructor)
 - rust-lang#119640 (library: Fix warnings in rtstartup)
 - rust-lang#119642 (library: Fix a symlink test failing on Windows)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#119628 - RalfJung:duplicate-test, r=compiler-errors

remove duplicate test

This was added in rust-lang@ace6fc3 where overflowing-rsh-6 differed from overflowing-rsh-5 in a feature gate, but the feature has since been stabilized, making the tests 100% identical.

Most of these tests in numbers-arithmetic could be put into one file rather than having so many files that all test the same lint... but it doesn't seem worth the effort. After rust-lang#119432 we might be able to remove most of them entirely as they will be covered by the new tests added there.