Merged PR 4687: Bugfix - Removal of SH fields that no longer exist

# Description

After the sync this morning in Core in Airbyte, we have some issues in SH User. This attempts to remove no longer existing fields, namely:
- id_airbnb
- airbnb_url
- platform_comms_recipient

# Checklist

- [X] The edited models and dependants run properly with production data.
- [X] The edited models are sufficiently documented.
- [X] The edited models contain PK tests, and I've ran and passed them.
- [ ] I have checked for DRY opportunities with other models and docs.
- [ ] I've picked the right materialization for the affected models.

# Other

- [ ] Check if a full-refresh is required after this PR is merged.

Related work items: #28502

models/reporting/core/core__unified_user.sql

@@ -24,8 +24,8 @@ select
     access_failed_count as access_failed_count,
     lockout_end_date_utc as lockout_end_date_utc,
     avatar as avatar,
-    id_airbnb as id_airbnb,
-    airbnb_url as airbnb_url,
+    null as id_airbnb,
+    null as airbnb_url,
     created_at_utc as created_at_utc,
     created_date_utc as created_date_utc,
     updated_at_utc as updated_at_utc,
@@ -35,7 +35,7 @@ select
     flag_as_problem as flag_as_problem,
     number_of_properties as number_of_properties,
     id_superhog_verified_set as id_superhog_verified_set,
-    platform_comms_recipient as platform_comms_recipient,
+    null as platform_comms_recipient,
     null as other_sharing_platform_url,
     id_user_verification_status as id_user_verification_status
 from core__unified_user