Remove __using__/2 from Quark.Partial (..)

The `:only` imported macros are the only public ones.

README.md

@@ -109,7 +109,7 @@ This does use up the full arity-space for that function name, however.
 ```elixir
 
 defmodule Foo do
-  use Quark.Partial
+  import Quark.Partial
 
   defpartial one(), do: 1
   defpartial minus(a, b, c), do: a - b - c

lib/quark.ex

@@ -11,7 +11,7 @@ defmodule Quark do
     quote do
       import unquote(__MODULE__)
       import Quark.Curry
-      use Quark.Partial
+      import Quark.Partial
       import Quark.Pointfree
     end
   end

lib/quark/bckw.ex

@@ -4,7 +4,7 @@ defmodule Quark.BCKW do
   A similar idea to `SKI`, but with different primitives.
   """
 
-  use Quark.Partial
+  import Quark.Partial
   import Quark.Curry, only: [curry: 1]
 
   @doc ~S"""

lib/quark/compose.ex

@@ -18,7 +18,7 @@ defmodule Quark.Compose do
 
   import Quark.SKI
 
-  use Quark.Partial
+  import Quark.Partial
   import Quark.Curry
 
   @doc ~S"""

lib/quark/fixed_point.ex

@@ -26,7 +26,7 @@ defmodule Quark.FixedPoint do
 
   """
 
-  use Quark.Partial
+  import Quark.Partial
   import Quark.Curry, only: [curry: 1]
 
   defdelegate fix(),  to: __MODULE__, as: :y

lib/quark/m.ex

@@ -1,7 +1,7 @@
 defmodule Quark.M do
   @moduledoc "The self-applyication combinator"
 
-  use Quark.Partial
+  import Quark.Partial
 
   @doc ~S"""
   Apply a function to itself. Also aliased as `self_apply`.

lib/quark/partial.ex

@@ -17,12 +17,6 @@ defmodule Quark.Partial do
 
   import Quark.Curry
 
-  defmacro __using__(_) do
-    quote do
-      import Quark.Partial, only: [defpartial: 2, defpartialp: 2]
-    end
-  end
-
   @doc ~S"""
   A convenience on `defcurry`. Generates a series of partially-bound
   applications of a fully-curried function, for all arities _at and below_

lib/quark/ski.ex

@@ -5,7 +5,7 @@ defmodule Quark.SKI do
   though generally not efficiently.
   """
 
-  use Quark.Partial
+  import Quark.Partial
 
   @doc ~S"""
   The identity combinator. Also aliased as `id`.

test/quark/partial_test.exs

@@ -1,6 +1,6 @@
 defmodule Quark.PartialTest do
   use ExUnit.Case, async: true
-  use Quark.Partial
+  import Quark.Partial
 
   defpartial one(), do: 1
   test "creates zero arity functions" do