chore: remove legacy completion adapter from Taskfile

Author: ivictbor

dev-demo/Taskfile.yaml

@@ -52,9 +52,6 @@ vars:
     - "adminforth-key-value-adapter-redis"
     - "adminforth-key-value-adapter-leveldb"
     - "adminforth-image-generation-adapter-nano-banana"
-    # legacy
-    - "adminforth-completion-adapter-open-ai-chat-gpt"
-
     - "adminforth-completion-adapter-openai-responses"
     - "adminforth-completion-adapter-antropic-messages"
     - "adminforth-completion-adapter-google-gemini"