Rollup merge of #24218 - lstat:remove-ignore-tidy, r=alexcrichton

 This is a really minor issue. I noticed some tests no longer need the ignore
tidy comment directive.

A quick grep turned up the following files:

    src/test/compile-fail/bad-mid-path-type-params.rs
    src/test/compile-fail/bad-sized.rs
    src/test/compile-fail/coherence-default-trait-impl.rs
    src/test/compile-fail/coherence-orphan.rs
    src/test/compile-fail/issue-8767.rs
    src/test/compile-fail/lint-stability.rs
    src/test/compile-fail/lint-uppercase-variables.rs
    src/test/compile-fail/typeck-default-trait-impl-outside-crate.rs
    src/test/compile-fail/use-after-move-implicity-coerced-object.rs
    src/test/debuginfo/gdb-pretty-std.rs

It didn't seem like it was worth opening an issue for this, but if that is not
the case (i.e. it is required), I'll open one up. Thanks!