chore(purchases): remove legacy-era purchases sources

app/Domains/Purchases/Http/Requests/UploadExpenseReceiptRequest.php

@@ -1,30 +0,0 @@
-<?php
-
-namespace App\Domains\Purchases\Http\Requests;
-
-use App\Rules\Base64Mime;
-use Illuminate\Foundation\Http\FormRequest;
-
-class UploadExpenseReceiptRequest extends FormRequest
-{
-    /**
-     * Determine if the user is authorized to make this request.
-     */
-    public function authorize(): bool
-    {
-        return true;
-    }
-
-    /**
-     * Get the validation rules that apply to the request.
-     */
-    public function rules(): array
-    {
-        return [
-            'attachment_receipt' => [
-                'nullable',
-                new Base64Mime(['gif', 'jpg', 'png']),
-            ],
-        ];
-    }
-}