Remove unused logger dependency

Author: fhunleth

mix.exs

@@ -21,9 +21,7 @@ defmodule CircularBuffer.MixProject do
 
   # Run "mix help compile.app" to learn about applications.
   def application do
-    [
-      extra_applications: [:logger]
-    ]
+    []
   end
 
   # Run "mix help deps" to learn about dependencies.