Fix deletion process on Rust 1.55

[Bobo1239]

Rust 1.55 unfortunately breaks the existing code which assumed that ErrorKind::Other will be returned by fs::read_dir() when a file is encountered. For now just always try deleting as if it's a file with the possibility to add the optimization back again once the io_error_more feature is stabilized.

References:

• https://blog.rust-lang.org/2021/09/09/Rust-1.55.0.html#stdioerrorkind-variants-updated
• https://github.com/rust-lang/rust/pull/85746
• https://github.com/rust-lang/rust/issues/86442

[Byron]

v2.14.7 was just released.