Fix more warnings

lib/json/ld/decoder.ex

@@ -88,11 +88,11 @@ defmodule JSON.LD.Decoder do
 
   # TODO: This should not be dependent on Poison as a JSON parser in general,
   #   but determine available JSON parsers and use one heuristically or by configuration
-  def parse_json(content, opts \\ []) do
+  def parse_json(content, _opts \\ []) do
     Poison.Parser.parse(content)
   end
 
-  def parse_json!(content, opts \\ []) do
+  def parse_json!(content, _opts \\ []) do
     Poison.Parser.parse!(content)
   end
 

lib/json/ld/utils.ex

@@ -53,11 +53,11 @@ defmodule JSON.LD.Utils do
                           is_boolean(value), do: true
   def scalar?(_), do: false
 
-  def list?(%{"@list" => _}), do: true
-  def list?(_),          do: false
+  def list?(%{"@list" => _}),   do: true
+  def list?(_),                 do: false
   def index?(%{"@index" => _}), do: true
-  def index?(_),          do: false
+  def index?(_),                do: false
   def value?(%{"@value" => _}), do: true
-  def value?(_),          do: false
+  def value?(_),                do: false
 
 end

test/unit/iri_expansion_test.exs

@@ -2,7 +2,6 @@ defmodule JSON.LD.IRIExpansionTest do
   use ExUnit.Case, async: false
 
   import JSON.LD.IRIExpansion
-  import RDF.Sigils
 
   setup do
     context = JSON.LD.context(%{