Remove OpenAI workhorse and API key references

ee/app/helpers/ee/application_settings_helper.rb

@@ -68,7 +68,6 @@ def visible_attributes
         :product_analytics_configurator_connection_string,
         :cube_api_base_url,
         :cube_api_key,
-        :openai_api_key,
         :security_policy_global_group_approvers_enabled,
         :security_approval_policies_limit,
         :anthropic_api_key,

ee/lib/ee/api/helpers/settings_helpers.rb

@@ -62,7 +62,6 @@ module SettingsHelpers
             optional :git_rate_limit_users_allowlist, type: Array[String], coerce_with: ::API::Validations::Types::CommaSeparatedToArray.coerce, desc: 'List of usernames excluded from Git anti-abuse rate limits'
             optional :git_rate_limit_users_alertlist, type: Array[Integer], desc: 'List of user ids who will be emailed when Git abuse rate limit is exceeded'
             optional :auto_ban_user_on_excessive_projects_download, type: Grape::API::Boolean, desc: 'Ban users from the application when they exceed maximum number of unique projects download in the specified time period'
-            optional :openai_api_key, type: String, desc: "OpenAI API key"
             optional :anthropic_api_key, type: String, desc: "Anthropic API key"
             optional :make_profile_private, type: Grape::API::Boolean, desc: 'Flag indicating if users are permitted to make their profiles private'
             optional :service_access_tokens_expiration_enforced, type: Grape::API::Boolean, desc: "To enforce token expiration for Service accounts users"

ee/lib/gitlab/llm/open_ai/workhorse.rb

-# frozen_string_literal: true
-
-module Gitlab
-  module Llm
-    module OpenAi
-      class Workhorse
-        OPEN_AI_API_URL = "https://api.openai.com/v1"
-        CHAT_URL = "#{OPEN_AI_API_URL}/chat/completions".freeze
-
-        class << self
-          def default_headers
-            {
-              'Authorization' => ["Bearer #{::Gitlab::CurrentSettings.openai_api_key}"],
-              'Content-Type' => ['application/json']
-            }
-          end
-
-          def chat_response(options:)
-            Gitlab::Workhorse.send_url(CHAT_URL,
-              body: options.to_json, headers: default_headers, method: "POST")
-          end
-        end
-      end
-    end
-  end
-end

ee/spec/helpers/ee/application_settings_helper_spec.rb

@@ -8,10 +8,6 @@
       expect(visible_attributes).to include(*%i[max_personal_access_token_lifetime])
     end
 
-    it 'contains openai_api_key value' do
-      expect(visible_attributes).to include(*%i[openai_api_key])
-    end
-
     it 'contains anthropic_api_key value' do
       expect(visible_attributes).to include(*%i[anthropic_api_key])
     end

ee/spec/requests/api/settings_spec.rb

@@ -168,15 +168,6 @@
       end
     end
 
-    context 'openai api key setting' do
-      it 'updates openai_api_key' do
-        put api('/application/settings', admin, admin_mode: true), params: { openai_api_key: 'OPENAI_API_KEY' }
-
-        expect(response).to have_gitlab_http_status(:ok)
-        expect(json_response['openai_api_key']).to eq('OPENAI_API_KEY')
-      end
-    end
-
     context 'anthropic api key setting' do
       it 'updates anthropic_api_key' do
         put api('/application/settings', admin, admin_mode: true), params: { anthropic_api_key: 'ANTHROPIC_API_KEY' }