UX: Hide AI bot in seeded LLM (#858)

AI bot won't be turned on for seeded LLMs so it makes no sense to expose it here. This will cleanup the template and avoid the double `{{#unless}}` check.

assets/javascripts/discourse/components/ai-llm-editor-form.gjs

@@ -300,7 +300,6 @@ export default class AiLlmEditorForm extends Component {
             @content={{i18n "discourse_ai.llms.hints.enabled_chat_bot"}}
           />
         </div>
-      {{/unless}}
 
         {{#if @model.user}}
           <div class="control-group">
@@ -318,7 +317,6 @@ export default class AiLlmEditorForm extends Component {
           </div>
         {{/if}}
 
-      {{#unless this.seeded}}
         <div class="control-group ai-llm-editor__action_panel">
           <DButton
             class="ai-llm-editor__test"