Remove unused ENV_FILE from install script

Since ENV_FILE is no longer replaced, remove the variable and its echo
to simplify the script.

Changes:
- Remove ENV_FILE definition
- Remove Env file echo in main

install.sh

@@ -14,7 +14,6 @@ NC='\033[0m' # No Color
 # Default paths
 PROJECT_DIR="$(pwd)"
 STATE_DIR="./state"
-ENV_FILE="./.env"
 
 # Functions
 check_dependencies() {
@@ -88,7 +87,6 @@ post_install() {
 echo -e "${GREEN}Email Forwarder Install Script${NC}"
 echo "Project dir: $PROJECT_DIR"
 echo "State dir: $STATE_DIR"
-echo "Env file: $ENV_FILE"
 echo ""
 
 read -p "Continue with installation? (y/N): " -n 1 -r