docs: remove models.png, keep only apps.png screenshot

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Co-Authored-By: csghub-lite <csghub-lite@users.noreply.github.com>

Author: ganisback

README.md

@@ -1,9 +1,5 @@
 # csghub-lite
 
-<p align="center">
-  <img src="docs/images/models.png" alt="Model Library" width="80%">
-</p>
-
 <p align="center">
   <img src="docs/images/apps.png" alt="AI Apps" width="80%">
 </p>