Remove expired 10-10 feature toggles (#20888)

Author: longmd

config/features.yml

@@ -117,15 +117,6 @@ features:
     actor_type: user
     description: Enables the registration-only path for the Health Care Application
     enable_in_development: true
-  hca_sigi_enabled:
-    actor_type: user
-    description: Enables Self-Identifying Gender Identity question for health care applicants.
-  hca_tera_branching_enabled:
-    actor_type: user
-    description: Enables branching logic for the Toxic Exposure questionset in the Health Care Application
-  hca_use_facilities_API:
-    actor_type: user
-    description: Allow list of medical care facilites to be fetched by way of the Facilities API.
   hca_log_form_attachment_create:
     actor_type: user
     description: Enable logging all successful-looking attachment creation calls to Sentry at info-level