Update .env.example

Author: timbrinded

.env.example

@@ -1,19 +1,2 @@
 PRIVATE_KEY=<your_private_key>
 ACCOUNT_ADDRESS=<your_hl_account_address>
-
-# Arbitrum RPCs
-# For production, defaults to https://arb1.arbitrum.io/rpc if not set
-ARBITRUM_RPC_URL=
-# For testnet, set one of these
-ARBITRUM_TESTNET_RPC_URL=
-ARBITRUM_SEPOLIA_RPC_URL=
-
-# USDC token addresses
-# Production defaults to Arbitrum One native USDC if not set
-USDC_TOKEN_ADDRESS=0xaf88d065e77c8cC2239327C5EDb3A432268e5831
-# Testnet must be provided
-USDC_TOKEN_TESTNET_ADDRESS=
-
-# Hyperliquid bridge2 deposit addresses (required)
-HL_BRIDGE2_ADDRESS=
-HL_BRIDGE2_TESTNET_ADDRESS=