fluent.util might be dead code

[Pike]

fluent.util was only used by migrate, iirc, so that can go down, too.

Forgot that in my review of the actual migrate removal.

[stasm]

I removed it in #59 for this very reason :) https://github.com/projectfluent/python-fluent/pull/59/files#diff-b76245a4408b93d88ecf9b584323fec9.

[Pike]

Tells you how thorough my review was 😬