If you're using the Shopify integration and have noticed an impact on site performance from the javascript file loading on every page, you can opt to remove the Shopify integration and manually manage the integration yourself.
This may be ideal if you are not using the Closeby launcher for you map, and simply wish to show an iframe embed of your map on specific store pages. Whatever the case, you can easily remove the Shopify JS script injection on every page by disconnecting your store from the Installation settings page.
Don't worry, this will not affect the billing integration with Shopify and will only stop the javascript from auto-loading on every page in your theme.
Note: By doing this, you will need to manually load the javascript or embed the iframe when you would like to use it, otherwise it won't work.