Small cleanup to pretty-printer.
Kidger's reimplementation of this code notes that the break mode and indent are unused in the _fits function (https://github.com/patrick-kidger/wadler_lindig/blob/851379b8f55e2bb98ea2c81905863f90f9606f0a/wadler_lindig/_wadler_lindig.py#L166).
We can make the same optimization here.