fix: vendor oban_web — never pull oban_pro from live repo

Remove conditional oban_repo_configured?() check that would pull
oban_pro from repo.oban.pro when hex config contained credentials.
The root mix.exs already provides oban_pro via vendored path.

vendor/oban_web/mix.exs

@@ -129,24 +129,10 @@ defmodule Oban.Web.MixProject do
   end
 
   defp oban_pro_dep do
-    if oban_repo_configured?() do
-      [{:oban_pro, "~> 1.7.0", repo: :oban, only: [:test, :dev]}]
-    else
+    # Always use the vendored oban_pro provided by the root mix.exs.
+    # Never pull from the live oban repo regardless of hex config.
     []
   end
-  end
-
-  defp oban_repo_configured? do
-    hex_config = Path.expand("~/.hex/hex.config")
-
-    case File.read(hex_config) do
-      {:ok, content} ->
-        String.contains?(content, "repo.oban.pro")
-
-      {:error, _} ->
-        false
-    end
-  end
 
   defp aliases do
     [