Remove obviated comment in zed-licenses.toml (#6946)

This PR removes a comment from `zed-licenses.toml`, as it no longer
applies now that we don't have `buildLicenses.ts` anymore.

Release Notes:

- N/A

script/licenses/zed-licenses.toml

@@ -1,5 +1,3 @@
-# NOTE: This file's location is hardcoded into the theme build system in 
-# styles/src/buildLicenses.ts
 no-clearly-defined = true
 private = { ignore = true }
 accepted = [