Standardize deployment env and deployer handling

scripts/deployment/deploy-optional-future-all.sh

@@ -29,12 +29,6 @@ elif [[ -n "${REPO_ROOT:-}" && -f "$REPO_ROOT/.env" ]]; then
   set +a
 fi
 
-if [ -f .env ]; then
-  set -a
-  source .env
-  set +a
-fi
-
 RPC="${RPC_URL_138:-http://192.168.11.211:8545}"
 # Default 2 gwei to reduce "Replacement transaction underpriced"; override with GAS_PRICE_138.
 GAS_PRICE="${GAS_PRICE_138:-2000000000}"
@@ -52,8 +46,7 @@ while [ $# -gt 0 ]; do
   shift
 done
 
-if [ -z "${PRIVATE_KEY:-}" ]; then
-  echo "ERROR: PRIVATE_KEY not set in .env"
+if ! require_private_key_env; then
   exit 1
 fi