chore(alerts): Remove metric alert rate limiting flag (#60487)

Author: isabellaenriquez

src/sentry/conf/server.py

@@ -1887,8 +1887,6 @@ def custom_parameter_sort(parameter: dict) -> tuple[str, int]:
     "organizations:on-demand-metrics-prefill": False,
     # Enable source maps debugger
     "organizations:source-maps-debugger-blue-thunder-edition": False,
-    # Enable metric alert rate limiting
-    "organizations:metric-alert-rate-limiting": False,
     # Enable the new suspect commits calculation that uses all frames in the stack trace
     "organizations:suspect-commits-all-frames": False,
     # Enable logs for debugging weekly reports

src/sentry/features/__init__.py

@@ -108,7 +108,6 @@
 default_manager.add("organizations:mep-rollout-flag", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:metric-alert-chartcuterie", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:metric-alert-ignore-archived", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
-default_manager.add("organizations:metric-alert-rate-limiting", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:metric-alert-threshold-period", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:metrics-extraction", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:more-slow-alerts", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)