Merge pull request #1806 from jsvisa/l2-env

docs(l2-rollup): rm the duplicated L1_BEACON_URL

Author: sbvegan

create-l2-rollup-example/.example.env

@@ -34,9 +34,6 @@ P2P_ADVERTISE_IP="127.0.0.1"
 # Default L2 Chain ID (can be any number between 10000-99999 for testing)
 L2_CHAIN_ID="16584"
 
-# L1 Beacon API URL for op-node (usually same provider as L1_RPC_URL)
-L1_BEACON_URL="https://ethereum-sepolia-beacon-api.publicnode.com"
-
 # ==========================================
 # ADVANCED: Component Environment Variables
 # ==========================================
@@ -59,4 +56,4 @@ OP_PROPOSER_POLL_INTERVAL="20s"
 # ==========================================
 # Uncomment these for local development with a local L1 network
 # L1_RPC_URL="http://host.docker.internal:8545"
-# L1_BEACON_URL="http://host.docker.internal:5052"
+# L1_BEACON_URL="http://host.docker.internal:5052"