chore: remove createdBy from the API report

Signed-off-by: blam <ben@blam.sh>

plugins/scaffolder-backend/api-report.md

@@ -495,7 +495,6 @@ export type SerializedTask = {
   lastHeartbeatAt?: string;
   createdBy?: string;
   secrets?: TaskSecrets;
-  createdBy: string | null;
 };
 
 // @public

plugins/scaffolder-common/api-report.md

@@ -15,8 +15,6 @@ export type TaskSpec = TaskSpecV1beta3;
 // @public
 export interface TaskSpecV1beta3 {
   apiVersion: 'scaffolder.backstage.io/v1beta3';
-  // (undocumented)
-  createdBy?: string;
   output: {
     [name: string]: JsonValue;
   };