chore(otlp): Remove span link feature flag declaration (#101207)

Flag usage removed recently.

Author: gggritso

src/sentry/features/temporary.py

@@ -435,8 +435,6 @@ def register_temporary_features(manager: FeatureManager) -> None:
     manager.add("organizations:trace-spans-format", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable feature to use trace admin ui.
     manager.add("organizations:trace-view-admin-ui", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
-    # Enable displaying span links in the attribute tree
-    manager.add("organizations:trace-view-span-links", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable feature to use trace tabs layout ui
     manager.add("organizations:trace-tabs-ui", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable feature to load new traces onboarding guide.