Fix conflict with laravel plugin

Author: hjJunior

src/Autoload.php

@@ -4,17 +4,13 @@
 
 namespace Cfx\PSpec;
 
-use Cfx\PSpec\Concern\HasLetVariables;
 use Closure;
 use Pest\Expectation;
 use Pest\PendingCalls\BeforeEachCall;
 use Pest\PendingCalls\DescribeCall;
-use Pest\Plugin;
 use Pest\Support\Backtrace;
 use Pest\TestSuite;
 
-Plugin::uses(HasLetVariables::class);
-
 function subject(Closure $subject): void
 {
     new SubjectTester($subject);