Simplify: Verify this line can be simplified

[OchiengEd]

virtwork/internal/config/config_test.go

Line 43 in 11ff821

key := env[:len(env)-len(env[len(env)-len(env):])]

This line appears to be unnecessarily complex. This seems like it can be simplified to key := env[:0] which is basically the same as key := []

[mrhillsman]

@OchiengEd yes def unnecessarily complex. idk if speed is a concern but strings.HasPrefix and strings.Cut can replace the entire if in the for loop with the exception of os.Unsetenv

[OchiengEd]

This was closed by #27