increase test coverage (#117)

70% test coverage
remove socialite

app/Actions/SourceControl/DeleteSourceControl.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Actions\SourceControl;
+
+use App\Models\SourceControl;
+
+class DeleteSourceControl
+{
+    public function delete(SourceControl $sourceControl): void
+    {
+        if ($sourceControl->sites()->exists()) {
+            throw new \Exception('This source control is being used by a site.');
+        }
+
+        $sourceControl->delete();
+    }
+}