docs: drop "once the Klarity app is live" preamble on ChatGPT install page

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Aditya Thiruvengadam

docs/install/chatgpt.mdx

@@ -11,8 +11,6 @@ icon: "/images/icons/openai.svg"
   - For other common install issues, see the [FAQ](/faq).
 </Info>
 
-Once the Klarity app is live in the OpenAI App Store:
-
 <Steps>
   <Step title="Open the app picker">
     In ChatGPT, click **Apps**.