Clarify remix source map deletion (#8579)

Author: Luca Forstner

src/platform-includes/sourcemaps/overview/javascript.remix.mdx

@@ -60,7 +60,10 @@ Please refer to the [Remix CLI docs](https://remix.run/docs/en/main/other-api/de
 
 ### Remove Remix Source Maps
 
-Remix validly discourages hosting source maps in production. After uploading the maps to Sentry, we suggest you delete the `.map` files. Here's a simple shell command example:
+Remix validly discourages hosting source maps in production. After uploading the maps to Sentry, we suggest you delete the `.map` files.
+The `sentry-upload-sourcemaps` script will automatically try to delete all generated source maps after they're uploaded (unless the `--deleteAfterUpload` flag is provided).
+
+If you want to be extra sure they're deleted, you can use the following shell script:
 
 ```bash {tabTitle:Bash}
 find ./public/build -type f -name '*.map' -delete