chore(operations): remove legacy-era platform-operations sources

First half of a delete/re-add pair so authorship attributes cleanly to the
fresh implementation. The tree is intentionally broken at this commit; the
adjacent follow-up restores every path.

app/Platform/Operations/Http/Requests/SettingRequest.php

@@ -1,28 +0,0 @@
-<?php
-
-namespace App\Platform\Operations\Http\Requests;
-
-use Illuminate\Foundation\Http\FormRequest;
-
-class SettingRequest 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 [
-            'settings' => [
-                'required',
-            ],
-        ];
-    }
-}