chore(performance): Remove old anomaly detection backend (#80696)

Effectively reverts #31533. As
far as we can tell, this never shipped, and has been replaced with a
different service. You tell me, though!

Frontend removed in #80692

Author: gggritso

.github/CODEOWNERS

@@ -228,8 +228,6 @@ yarn.lock                                                @getsentry/owners-js-de
 /tests/snuba/api/endpoints/test_organization_events_vitals.py               @getsentry/visibility
 /tests/snuba/api/endpoints/test_organization_tagkey_values.py               @getsentry/visibility
 
-/src/sentry/api/endpoints/organization_transaction_anomaly_detection.py     @getsentry/data
-
 /src/sentry/spans/                                                          @getsentry/visibility
 /tests/sentry/spans/                                                        @getsentry/visibility
 

src/sentry/api/endpoints/organization_transaction_anomaly_detection.py

@@ -560,9 +560,6 @@
     OrganizationTraceSpansEndpoint,
     OrganizationTracesStatsEndpoint,
 )
-from .endpoints.organization_transaction_anomaly_detection import (
-    OrganizationTransactionAnomalyDetectionEndpoint,
-)
 from .endpoints.organization_user_details import OrganizationUserDetailsEndpoint
 from .endpoints.organization_user_reports import OrganizationUserReportsEndpoint
 from .endpoints.organization_user_teams import OrganizationUserTeamsEndpoint
@@ -1997,11 +1994,6 @@ def create_group_urls(name_prefix: str) -> list[URLPattern | URLResolver]:
         OrganizationJoinRequestEndpoint.as_view(),
         name="sentry-api-0-organization-join-request",
     ),
-    re_path(
-        r"^(?P<organization_id_or_slug>[^\/]+)/transaction-anomaly-detection/$",
-        OrganizationTransactionAnomalyDetectionEndpoint.as_view(),
-        name="sentry-api-0-organization-transaction-anomaly-detection",
-    ),
     # relay usage
     re_path(
         r"^(?P<organization_id_or_slug>[^\/]+)/relay_usage/$",

src/sentry/api/urls.py

@@ -242,8 +242,6 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:ownership-size-limit-large", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
     # Enable xlarge ownership rule file size limit
     manager.add("organizations:ownership-size-limit-xlarge", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
-    # Enable views for anomaly detection
-    manager.add("organizations:performance-anomaly-detection-ui", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable mobile performance score calculation for transactions in relay
     manager.add("organizations:performance-calculate-mobile-perf-score-relay", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, api_expose=False)
     # Enable performance change explorer panel on trends page