Remove override from mix.exs (#165)

* Update mix.installs

* Remove override from Nx

mix.exs

@@ -30,7 +30,7 @@ defmodule Scholar.MixProject do
   defp deps do
     [
       {:ex_doc, "~> 0.30", only: :docs},
-      {:nx, "~> 0.6", override: true},
+      {:nx, "~> 0.6"},
       {:nimble_options, "~> 0.5.2 or ~> 1.0"},
       {:exla, "~> 0.6"},
       {:polaris, "~> 0.1"}