Remove iterator feature flag (#15165)

As title

packages/twenty-server/src/modules/workflow/workflow-builder/workflow-schema/workflow-schema.workspace-service.ts

@@ -14,8 +14,6 @@ import {
 
 import { type DatabaseEventAction } from 'src/engine/api/graphql/graphql-query-runner/enums/database-event-action';
 import { checkStringIsDatabaseEventAction } from 'src/engine/api/graphql/graphql-query-runner/utils/check-string-is-database-event-action';
-import { FeatureFlagKey } from 'src/engine/core-modules/feature-flag/enums/feature-flag-key.enum';
-import { FeatureFlagService } from 'src/engine/core-modules/feature-flag/services/feature-flag.service';
 import { generateFakeValue } from 'src/engine/utils/generate-fake-value';
 import { WorkflowCommonWorkspaceService } from 'src/modules/workflow/common/workspace-services/workflow-common.workspace-service';
 import { DEFAULT_ITERATOR_CURRENT_ITEM } from 'src/modules/workflow/workflow-builder/workflow-schema/constants/default-iterator-current-item.const';
@@ -44,7 +42,6 @@ import {
 export class WorkflowSchemaWorkspaceService {
   constructor(
     private readonly workflowCommonWorkspaceService: WorkflowCommonWorkspaceService,
-    private readonly featureFlagService: FeatureFlagService,
   ) {}
 
   async computeStepOutputSchema({
@@ -66,29 +63,15 @@ export class WorkflowSchemaWorkspaceService {
         });
       }
       case WorkflowTriggerType.MANUAL: {
-        const isIteratorEnabled =
-          await this.featureFlagService.isFeatureEnabled(
-            FeatureFlagKey.IS_WORKFLOW_ITERATOR_ENABLED,
-            workspaceId,
-          );
+        const { availability } = step.settings;
 
-        const { objectType, availability } = step.settings;
-
-        if (isDefined(availability) && isIteratorEnabled) {
+        if (isDefined(availability)) {
           return this.computeTriggerOutputSchemaFromAvailability({
             availability,
             workspaceId,
           });
         }
 
-        // TODO: to be deprecated once all triggers are migrated to the new availability type
-        if (isDefined(objectType)) {
-          return this.computeRecordOutputSchema({
-            objectType,
-            workspaceId,
-          });
-        }
-
         return {};
       }
       case WorkflowTriggerType.WEBHOOK: