Update .env.example

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Author: AmirMhMdY

.env.example

@@ -5,13 +5,7 @@
 # When this value is unset searches will be proxied to the production Elasticsearch endpoint
 ELASTICSEARCH_URL=http://localhost:9200
 
-# Set for sending events in local development. See https://github.com/github/docs-engineering/blob/main/docs/analytics/hydro-mock.md
-HYDRO_ENDPOINT=
-HYDRO_SECRET=
-
-# Localization variables
-# See https://github.com/github/docs-internal/tree/main/src/languages#working-with-translated-content-locally
-ENABLED_LANGUAGES=
+# Set for sending events in local development. See https://github.com/github/docs-engineering/blob/main/docs/ENABLED_LANGUAGES=
 TRANSLATIONS_ROOT=
 
 # For running the src/search/scripts/scrape script