remove plano from docker-compose, use native planoai up in demos

demos/getting_started/llm_gateway/docker-compose.yaml

@@ -1,20 +1,5 @@
 services:
 
-  plano:
-    build:
-      context: ../../../
-      dockerfile: Dockerfile
-    ports:
-      - "12000:12000"
-      - "12001:12001"
-    environment:
-      - PLANO_CONFIG_PATH=/app/plano_config.yaml
-      - OPENAI_API_KEY=${OPENAI_API_KEY:?OPENAI_API_KEY environment variable is required but not set}
-      - OTEL_TRACING_GRPC_ENDPOINT=http://host.docker.internal:4317
-    volumes:
-      - ./config.yaml:/app/plano_config.yaml:ro
-      - /etc/ssl/cert.pem:/etc/ssl/cert.pem
-
   anythingllm:
     image: mintplexlabs/anythingllm
     restart: always
@@ -25,7 +10,7 @@ services:
     environment:
       - STORAGE_DIR=/app/server/storage
       - LLM_PROVIDER=generic-openai
-      - GENERIC_OPEN_AI_BASE_PATH=http://plano:12000/v1
+      - GENERIC_OPEN_AI_BASE_PATH=http://host.docker.internal:12000/v1
       - GENERIC_OPEN_AI_MODEL_PREF=gpt-4o-mini
       - GENERIC_OPEN_AI_MODEL_TOKEN_LIMIT=128000
       - GENERIC_OPEN_AI_API_KEY=sk-placeholder