Remove deprecated Assert class

Author: jessarcher

src/Testing/Assert.php

@@ -3,18 +3,13 @@
 namespace Inertia\Testing;
 
 use Closure;
-use Illuminate\Testing\Fluent\AssertableJson;
 
 class TestResponseMacros
 {
     public function assertInertia()
     {
         return function (Closure $callback = null) {
-            if (class_exists(AssertableJson::class)) {
-                $assert = AssertableInertia::fromTestResponse($this);
-            } else {
-                $assert = Assert::fromTestResponse($this);
-            }
+            $assert = AssertableInertia::fromTestResponse($this);
 
             if (is_null($callback)) {
                 return $this;
@@ -29,11 +24,7 @@ public function assertInertia()
     public function inertiaPage()
     {
         return function () {
-            if (class_exists(AssertableJson::class)) {
-                return AssertableInertia::fromTestResponse($this)->toArray();
-            }
-
-            return Assert::fromTestResponse($this)->toArray();
+            return AssertableInertia::fromTestResponse($this)->toArray();
         };
     }
 }