fix(goose): remove MCP_HOST and such, this is not how mcp works

drivers/goose/mc-driver.yaml

@@ -1,5 +1,5 @@
 name: goose
-description: Goose with MCP servers
+description: Goose AI environment
 version: 1.0.0
 maintainer: team@monadical.com
 
@@ -8,10 +8,6 @@ init:
   command: /entrypoint.sh
 
 environment:
-  - name: MCP_HOST
-    description: MCP server host
-    required: true
-    default: http://localhost:8000
 
   - name: LANGFUSE_INIT_PROJECT_PUBLIC_KEY
     description: Langfuse public key