ref(insights): remove performance-landing-page-stats-period flag (#86200)

To be merged after #86199

Author: DominikB2014

src/sentry/features/temporary.py

@@ -227,8 +227,6 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:performance-issues-dev", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Temporary flag to test search performance that's running slow in S4S
     manager.add("organizations:performance-issues-search", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, default=True, api_expose=False)
-    # Enables a longer stats period for the performance landing page
-    manager.add("organizations:performance-landing-page-stats-period", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable consecutive http performance issue type
     manager.add("organizations:performance-large-http-payload-detector", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, api_expose=False)
     # Enable internal view for bannerless MEP view