Warns on modules with `use`

[pbrudnick]

Bug Description

Phoenix defines routes which are dispatched to controller:functions.
In these modules, it sets use MyAppWeb, :controller
The functions expect 2 arguments:

def get(conn, params) do

This rule warns when ignoring the second:

def counters(conn, _params) do

To Reproduce

Ignore the second argument in a controller function in a Phoenix app.

Expected Behavior

Or ignore those or clarify if those should be manually ignored