chore(features): Remove organizations:device-class-synthesis (#112743)

Removes this feature that is 100% released in getsentry. Relies on us
removing the reliance on this in relay, and confirming that it's fine to
100% release this in self hosted.

Relay pr: getsentry/relay#5816

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

Author: wedamija

src/sentry/features/temporary.py

@@ -106,8 +106,6 @@ def register_temporary_features(manager: FeatureManager) -> None:
     manager.add("organizations:intercom-support", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable default anomaly detection metric monitor for new projects
     manager.add("organizations:default-anomaly-detector", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
-    # Enables synthesis of device.class in ingest
-    manager.add("organizations:device-class-synthesis", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, api_expose=False)
     # Enable the 'discover' interface. (might be unused)
     manager.add("organizations:discover", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, api_expose=True)
     # Enable the discover saved queries deprecation warnings

src/sentry/relay/config/__init__.py

@@ -52,7 +52,6 @@
 # These features will be listed in the project config.
 EXPOSABLE_FEATURES = [
     "organizations:continuous-profiling",
-    "organizations:device-class-synthesis",
     "organizations:profiling",
     "organizations:session-replay-recording-scrubbing",
     "organizations:session-replay-video-disabled",