Clean command does not clean metro-cache on win32

[acoates-ms]

Summary:

The fs.rm function on win32 does not expand 's, so the code to delete the metro cache using fs.rm('/metro-') does not delete anything on win32.

Checklist

• Documentation is up to date to reflect these changes.
• Follows commit message convention described in CONTRIBUTING.md

[thymikee]

Hm, fs.rmSync on macOS also doesn't expand (I wouldn't expect that tbh), so this doesn't seem to be Windows related, and it looks like it doesn't work really for these -* cases

[TMisiukiewicz]

Hm, fs.rmSync on macOS also doesn't expand (I wouldn't expect that tbh), so this doesn't seem to be Windows related, and it looks like it doesn't work really for these -* cases

I tried it and seems you are right, I'd say we could skip the os check here

[TMisiukiewicz]

Tested this PR again with removed OS check - seems like it doesn't work on macOS. I'll look for a proper solution satisfying both systems