docs: deprecate starting in host mode via CLI (#331)

Author: quetzalliwrites

src/content/docs/aws/capabilities/config/filesystem.mdx

@@ -107,8 +107,3 @@ The defaults are:
 - Mac: `~/Library/Caches/localstack/volume`
 - Linux: `~/.cache/localstack/volume`
 - Windows: `%LOCALAPPDATA%\cache\localstack\volume`
-
-## Host mode
-
-When LocalStack is running in host mode, the system directories `/usr/lib/localstack` or `/var/lib/localstack` are not used.
-Instead, the root directory is changed to `FILESYSTEM_ROOT` which defaults to `./.filesystem`, i.e. the LocalStack project root.