While porting dotnet/corefx#40611 to Mono, @baulig noticed a deleted line
checking the Dev fields of the struct FileStatus outputs of LStat for the source and destination files. No discussion was made about that change, which seems incorrect, and the comment on the next line even alludes to the removed check.

The line:
https://github.com/dotnet/corefx/pull/40611/files#r401020707

The Mono discussion:
https://github.com/mono/corefx/pull/395/files#r400813984

//cc original reviewers @stephentoub @carlossanlop @JeremyKuhne