Remove fuzz-fuzz.zip from source code

[cyrilc-pro]

This package includes a file fuzz/fuzz-fuzz.zip which includes binaries (sonar.exe, cover.exe). These files are detected as vulnerable by security scanners as they were compiled with Go 1.14.1.
I think this is file should not be committed into Git.

[agnivade]

A PR would be most welcome :)

[cyrilc-pro]

What do you suggest? Can we just remove the zip file?

[agnivade]

Historically, Go exe files have been known to raise false vulnerabilities by scanners.

This code was added quite a while back and now there's native fuzzing available in the Go toolchain. It would be great if you want to revamp the entire fuzzing part - remove all the old code, and redo fuzzing using the new way.

Otherwise, I don't think there's a big downside in keeping them.