Remove the use of L2 chain & contracts for running nitro nodes (#11)

Part of [Create bridge channel in go-nitro](https://www.notion.so/Create-bridge-channel-in-go-nitro-22ce80a0d8ae4edb80020a8f250ea270)
- Remove L2 stack setup from demo steps
- Remove steps to deploy l2 contract

Co-authored-by: Shreerang Kale <shreerangkale@gmail.com>
Co-authored-by: Neeraj <neeraj.rtly@gmail.com>
Reviewed-on: #11

stack-orchestrator/compose/docker-compose-nitro-bridge.yml

@@ -1,38 +1,13 @@
 name: nitro-bridge
 
 services:
-  l2-nitro-contracts:
-    image: cerc/nitro-client:local
-    restart: on-failure
-    environment:
-      CERC_SCRIPT_DEBUG: ${CERC_SCRIPT_DEBUG}
-      OPTIMISM_DEPLOYER_PK: ${OPTIMISM_DEPLOYER_PK}
-      OPTIMISM_CHAIN_ID: ${OPTIMISM_CHAIN_ID:-42069}
-      OPTIMISM_URL: ${OPTIMISM_URL}
-      TOKEN_NAME: ${TOKEN_NAME}
-      TOKEN_SYMBOL: ${TOKEN_SYMBOL}
-      INITIAL_TOKEN_SUPPLY: ${INITIAL_TOKEN_SUPPLY}
-      DISABLE_DETERMINISTIC_DEPLOYMENT: ${DISABLE_DETERMINISTIC_DEPLOYMENT:-true}
-      L1_ASSET_ADDRESS: ${L1_ASSET_ADDRESS}
-    volumes:
-      - nitro_deployment:/app/deployment
-      - ../config/nitro-contracts/deploy-l2-contracts.sh:/app/deploy-l2-contracts.sh
-    command: ["bash", "-c", "/app/deploy-l2-contracts.sh"]
-    extra_hosts:
-      - "host.docker.internal:host-gateway"
-
   nitro-bridge:
     image: cerc/go-nitro:local
     hostname: nitro-bridge
     restart: unless-stopped
-    depends_on:
-      l2-nitro-contracts:
-        condition: service_started
     environment:
       CERC_SCRIPT_DEBUG: ${CERC_SCRIPT_DEBUG}
-      OPTIMISM_CHAIN_ID: ${OPTIMISM_CHAIN_ID:-42069}
-      NITRO_L1_CHAIN_URL: ${NITRO_L1_CHAIN_URL}
-      NITRO_L2_CHAIN_URL: ${NITRO_L2_CHAIN_URL}
+      NITRO_CHAIN_URL: ${NITRO_CHAIN_URL}
       NITRO_CHAIN_PK: ${NITRO_CHAIN_PK}
       NITRO_SC_PK: ${NITRO_SC_PK}
       NITRO_L1_MSG_PORT: ${NITRO_L1_MSG_PORT:-3005}

stack-orchestrator/compose/docker-compose-nitro-node.yml

@@ -19,7 +19,6 @@ services:
       NA_ADDRESS: ${NA_ADDRESS}
       CA_ADDRESS: ${CA_ADDRESS}
       VPA_ADDRESS: ${VPA_ADDRESS}
-      BRIDGE_ADDRESS: ${BRIDGE_ADDRESS}
       NITRO_PUBLIC_RPC_HOST: nitro-node
     entrypoint: ["bash", "-c", "/app/run-nitro-node.sh"]
     volumes: