diff --git a/ee/config/feature_flags/beta/duo_workflow_prompt_registry.yml b/ee/config/feature_flags/beta/duo_workflow_prompt_registry.yml
deleted file mode 100644
index eede7aac914b607efbdefc93ea0c526593ee9439..0000000000000000000000000000000000000000
--- a/ee/config/feature_flags/beta/duo_workflow_prompt_registry.yml
+++ /dev/null
@@ -1,10 +0,0 @@
----
-name: duo_workflow_prompt_registry
-description: Use Prompt Registry in Duo Workflow
-feature_issue_url: https://gitlab.com/gitlab-org/modelops/applied-ml/code-suggestions/ai-assist/-/issues/1072
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/196485
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/553292
-milestone: '18.2'
-group: group::ai framework
-type: beta
-default_enabled: false
diff --git a/ee/lib/api/helpers/duo_workflow_helpers.rb b/ee/lib/api/helpers/duo_workflow_helpers.rb
index 13a481a60f79c480677c6f95a6e33197dc1d030f..e3a4a6945b1943d1e484d63ed7b1b30a1a436532 100644
--- a/ee/lib/api/helpers/duo_workflow_helpers.rb
+++ b/ee/lib/api/helpers/duo_workflow_helpers.rb
@@ -17,7 +17,6 @@ def push_ai_gateway_headers
       def push_feature_flags
         Gitlab::AiGateway.push_feature_flag(:duo_workflow_work_item_tools, current_user)
         Gitlab::AiGateway.push_feature_flag(:expanded_ai_logging, current_user)
-        Gitlab::AiGateway.push_feature_flag(:duo_workflow_prompt_registry, current_user)
         Gitlab::AiGateway.push_feature_flag(:use_duo_context_exclusion, current_user)
         Gitlab::AiGateway.push_feature_flag(:duo_agentic_chat_openai_gpt_5, current_user)
         Gitlab::AiGateway.push_feature_flag(:dap_side_panel, current_user)