Fix: Remove unnecessary import

Author: Aluisio-Pires

app/Http/Requests/Auth/LoginRequest.php

@@ -6,7 +6,6 @@
 use Illuminate\Foundation\Http\FormRequest;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\RateLimiter;
-use Illuminate\Support\Str;
 use Illuminate\Validation\ValidationException;
 
 class LoginRequest extends FormRequest