Avoid unnecessary module attributes

lib/music_library/records/cover.ex

@@ -1,17 +1,18 @@
 defmodule MusicLibrary.Records.Cover do
+  alias Vix.Vips.{Image, Operation}
+
+  fallback_path = Application.app_dir(:music_library, ["priv", "cover-not-found.jpg"])
+  fallback_data = File.read!(fallback_path)
+
+  @external_resource fallback_path
+
   @size 600
 
-  @fallback_path Application.app_dir(:music_library, ["priv", "cover-not-found.jpg"])
-
-  @external_resource @fallback_path
-
-  @fallback_data File.read!(@fallback_path)
-
-  def fallback_data, do: @fallback_data
+  def fallback_data, do: unquote(fallback_data)
 
   def resize(cover_data, size \\ @size) do
-    {:ok, thumb} = Vix.Vips.Operation.thumbnail_buffer(cover_data, size)
-    Vix.Vips.Image.write_to_buffer(thumb, ".jpg")
+    {:ok, thumb} = Operation.thumbnail_buffer(cover_data, size)
+    Image.write_to_buffer(thumb, ".jpg")
   end
 
   def hash(cover_data) do
@@ -19,8 +20,8 @@ defmodule MusicLibrary.Records.Cover do
   end
 
   def correct_size?(cover_data) do
-    {:ok, image} = Vix.Vips.Image.new_from_buffer(cover_data)
+    {:ok, image} = Image.new_from_buffer(cover_data)
 
-    Vix.Vips.Image.width(image) == @size
+    Image.width(image) == @size
   end
 end