chore: remove leftover experiment references (metadataDrivenSubtasks)

Author: hannesrudolph

src/__tests__/history-resume-delegation.spec.ts

@@ -2,7 +2,6 @@
 
 import { describe, it, expect, vi, beforeEach } from "vitest"
 import { RooCodeEventName } from "@roo-code/types"
-import { EXPERIMENT_IDS } from "../shared/experiments"
 
 /* vscode mock for Task/Provider imports */
 vi.mock("vscode", () => {

webview-ui/src/context/__tests__/ExtensionStateContext.spec.tsx

@@ -239,7 +239,6 @@ describe("mergeExtensionState", () => {
 				imageGeneration: false,
 				runSlashCommand: false,
 				nativeToolCalling: false,
-				metadataDrivenSubtasks: false,
 			} as Record<ExperimentId, boolean>,
 			checkpointTimeout: DEFAULT_CHECKPOINT_TIMEOUT_SECONDS + 5,
 		}
@@ -262,7 +261,6 @@ describe("mergeExtensionState", () => {
 			imageGeneration: false,
 			runSlashCommand: false,
 			nativeToolCalling: false,
-			metadataDrivenSubtasks: false,
 		})
 	})
 })