fix(portainer-agent): remove cluster address environment variable

Author: dargmuesli

src/development/stack.yml

@@ -230,8 +230,6 @@ services:
       placement:
         constraints:
           - node.platform.os == linux
-    environment:
-      AGENT_CLUSTER_ADDR: tasks.portainer-agent
     image: portainer/agent:2.27.1
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock