NOTE: this package is not compatible with Elm 0.19.1

README About Versions Source Modules

Lint.Rules.NoUnusedVariables

rule : LintRule

Reports variables that are declared but never used.

rules =
    [ NoUnusedVariables.rule
    ]

Fail

module Main exposing (a)
a n =
    n + 1
b = a 2

Success

module Main exposing (a)
a n =
    n + 1