Unused import tool

[Timon Gehr]

On 8/15/23 10:13, RazvanN wrote:
> 
> I have tested this tool with some dmd sources and have already 
> identified [unused 
> imports](https://github.com/dlang/dmd/pulls?q=is%3Apr+delete+unused+imports+author%3ARazvanN7+is%3Aopen)·

Not a big complaint, just something of which to be aware: Removing 
imports that are actually unused but can be relevant to the module will 
break forks on rebase. E.g., the removal of `import dmd.tokens` from 
`attrib.d` broke my implementation of UnpackDeclaration in the 
`tuple-syntax` branch.