fix: Drop the experimental warning

Still somewhat experimental, but annoying as it can't be disabled.

Author: dustinbyrne

packages/browser/src/entrypoints/module.slim.es.ts

@@ -1,7 +1,3 @@
-/* eslint-disable-next-line no-console */
-console.warn(
-    '[PostHog Experimental] The slim module is experimental and may break or change on any release. Please use with caution and report any issues you encounter.'
-)
 import './external-scripts-loader'
 import posthog from './module.slim.no-external.es'
 export * from './module.slim.no-external.es'