remove feature flag (#16967)

Co-authored-by: Chris Kim <[email protected]>

Author: chriskim2311

config/sync/feature_toggle.features.yml

@@ -2,7 +2,6 @@ _core:
   default_config_hash: daCVJgiGNXHoQmWA2-cvaQEapbq7AGlBQtopOWTqqlw
 features:
   feature_all_hub_side_navs: FEATURE_ALL_HUB_SIDE_NAVS
-  feature_single_value_field_link: FEATURE_SINGLE_VALUE_FIELD_LINK
   feature_health_connect_number: FEATURE_HEALTH_CONNECT_NUMBER
   feature_next_story_preview: FEATURE_NEXT_STORY_PREVIEW
   feature_mobile_app_promo: FEATURE_MOBILE_APP_PROMO