chore(flags): Remove unused organizations:performance-queries-mongodb-extraction feature flag (#112747)

This flag isn't read by relay anymore and isn't used anywhere else, so
just removing.

<!-- Describe your PR here. -->

Author: wedamija

src/sentry/features/temporary.py

@@ -226,8 +226,6 @@ def register_temporary_features(manager: FeatureManager) -> None:
     manager.add("organizations:performance-issues-spans", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, default=False, api_expose=False)
     # Re-enable histograms for Metrics Enhanced Performance Views
     manager.add("organizations:performance-mep-reintroduce-histograms", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
-    # Enable MongoDB support for the Queries module
-    manager.add("organizations:performance-queries-mongodb-extraction", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable removing the fallback for metrics compatibility
     manager.add("organizations:performance-remove-metrics-compatibility-fallback", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable AI and MCP module dashboards on dashboards platform

src/sentry/relay/config/__init__.py

@@ -53,7 +53,6 @@
 EXPOSABLE_FEATURES = [
     "organizations:continuous-profiling",
     "organizations:device-class-synthesis",
-    "organizations:performance-queries-mongodb-extraction",
     "organizations:profiling",
     "organizations:session-replay-recording-scrubbing",
     "organizations:session-replay-video-disabled",