fix(escalating): Remove escalating-issues-ui feature flag (#51187)

Author: scttcper

src/sentry/conf/server.py

@@ -1346,8 +1346,6 @@ def SOCIAL_AUTH_DEFAULT_USERNAME() -> str:
     "organizations:discover-query": True,
     # Enable archive/escalating issue workflow
     "organizations:escalating-issues": False,
-    # Enable archive/escalating issue workflow UI, enable everything except post processing
-    "organizations:escalating-issues-ui": False,
     # Enable escalating forecast threshold a/b experiment
     "organizations:escalating-issues-experiment-group": False,
     # Enable archive/escalating issue workflow features in v2

src/sentry/features/__init__.py

@@ -218,7 +218,6 @@
 default_manager.add("organizations:dynamic-sampling", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:dynamic-sampling-transaction-name-priority", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:escalating-issues", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
-default_manager.add("organizations:escalating-issues-ui", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:escalating-issues-experiment-group", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:escalating-issues-v2", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:issue-states", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)