Remove orphaned setup-env.sh script

This script was not referenced anywhere in the codebase and used
an outdated approach for credential management. Current workflow
bakes credentials into Docker image from .env file in project root.

scripts/setup-env.sh

@@ -1,49 +0,0 @@
-#!/bin/bash
-# ABOUTME: Setup script to create ~/.claude-docker/.env with Twilio credentials
-# ABOUTME: Run this once on your host machine to configure Twilio for all projects
-
-CLAUDE_DOCKER_DIR="$HOME/.claude-docker"
-ENV_FILE="$CLAUDE_DOCKER_DIR/.env"
-
-# Create directory if it doesn't exist
-mkdir -p "$CLAUDE_DOCKER_DIR"
-
-# Check if .env already exists
-if [ -f "$ENV_FILE" ]; then
-    echo "⚠️  $ENV_FILE already exists!"
-    read -p "Do you want to update it? (y/N) " -n 1 -r
-    echo
-    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
-        exit 0
-    fi
-fi
-
-echo "Setting up Twilio credentials for Claude Docker..."
-echo "You'll need your Twilio account information."
-echo
-
-# Collect Twilio credentials
-read -p "Enter your Twilio Account SID: " TWILIO_ACCOUNT_SID
-read -sp "Enter your Twilio Auth Token: " TWILIO_AUTH_TOKEN
-echo
-read -p "Enter your Twilio phone number (with country code, e.g., +1234567890): " TWILIO_FROM_NUMBER
-read -p "Enter the phone number to receive SMS (with country code): " TWILIO_TO_NUMBER
-
-# Create .env file
-cat > "$ENV_FILE" << EOF
-# Twilio credentials for Claude Docker
-TWILIO_ACCOUNT_SID=$TWILIO_ACCOUNT_SID
-TWILIO_AUTH_TOKEN=$TWILIO_AUTH_TOKEN
-TWILIO_FROM_NUMBER=$TWILIO_FROM_NUMBER
-TWILIO_TO_NUMBER=$TWILIO_TO_NUMBER
-EOF
-
-# Set restrictive permissions
-chmod 600 "$ENV_FILE"
-
-echo
-echo "✅ Twilio credentials saved to $ENV_FILE"
-echo "These credentials will be available to all Claude Docker sessions."
-echo
-echo "To test, run claude-docker from any project directory and use:"
-echo "  node /workspace/test-twilio.js"