chore(perf): Remove HTTP module feature flag (#69859)

We've GA'd, and the feature lives under the permanent `spans-first-ui`
flag.

src/sentry/conf/server.py

@@ -1749,8 +1749,6 @@ SENTRY_FEATURES: dict[str, bool | None] = {
     "organizations:performance-screens-view": False,
     # Enable platform selector for screens flow
     "organizations:performance-screens-platform-selector": False,
-    # Enable API aka HTTP aka Network Performance module
-    "organizations:performance-http-view": False,
     # Enable column that shows ttid ttfd contributing spans
     "organizations:mobile-ttid-ttfd-contribution": False,
     # Enable histogram view in span details

src/sentry/features/temporary.py

@@ -140,7 +140,6 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:performance-discover-widget-split-override-save", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:performance-discover-widget-split-ui", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:performance-file-io-main-thread-detector", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
-    manager.add("organizations:performance-http-view", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:performance-issues-all-events-tab", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:performance-issues-dev", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:performance-issues-search", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)