feat(issues): Remove all views banner prompt key

Stop registering issue_views_all_views_banner in the prompt config
so the backend no longer accepts or serves this retired banner key.

Co-Authored-By: Claude <noreply@anthropic.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: 3 people

src/sentry/utils/prompts.py

@@ -23,7 +23,6 @@ class _PromptConfig(TypedDict):
     "issue_priority": {"required_fields": ["organization_id"]},
     "issue_replay_inline_onboarding": {"required_fields": ["organization_id", "project_id"]},
     "issue_views_add_view_banner": {"required_fields": ["organization_id"]},
-    "issue_views_all_views_banner": {"required_fields": ["organization_id"]},
     "metric_alert_ignore_archived_issues": {"required_fields": ["organization_id", "project_id"]},
     "profiling_onboarding": {"required_fields": ["organization_id"]},
     "quick_trace_missing": {"required_fields": ["organization_id", "project_id"]},