fix(teable): remove unnecessary .creds file

PG_DB_PASS is auto-generated by setup_postgresql_db and stored in
.env. No user-facing credentials are generated - accounts are
created via the web UI.

install/teable-install.sh

@@ -67,14 +67,6 @@ if [ -d "/opt/teable/apps/nestjs-backend/static/static" ]; then
 else
   ln -sf /opt/teable/apps/nestjs-backend/static /opt/teable/static
 fi
-{
-  echo "Teable Credentials"
-  echo "=================="
-  echo "Database User: teable"
-  echo "Database Password: ${PG_DB_PASS}"
-  echo "Database Name: teable"
-  echo "Secret Key: ${SECRET_KEY}"
-} >~/teable.creds
 msg_ok "Configured Teable"
 
 msg_info "Creating Service"