chore: remove outdated experiment IDs from test mocks

Clean up ExtensionStateContext test to only use official experiments:
- powerSteering, multiFileApplyDiff, preventFocusDisruption, imageGeneration, runSlashCommand

Removed stale references: marketplace, disableCompletionCommand, concurrentFileReads,
newTaskRequireTodos, nativeToolCalling, metadataDrivenSubtasks

Author: hannesrudolph

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

@@ -230,16 +230,10 @@ describe("mergeExtensionState", () => {
 			apiConfiguration: { modelMaxThinkingTokens: 456, modelTemperature: 0.3 },
 			experiments: {
 				powerSteering: true,
-				marketplace: false,
-				disableCompletionCommand: false,
-				concurrentFileReads: true,
 				multiFileApplyDiff: true,
 				preventFocusDisruption: false,
-				newTaskRequireTodos: false,
 				imageGeneration: false,
 				runSlashCommand: false,
-				nativeToolCalling: false,
-				metadataDrivenSubtasks: false,
 			} as Record<ExperimentId, boolean>,
 			checkpointTimeout: DEFAULT_CHECKPOINT_TIMEOUT_SECONDS + 5,
 		}
@@ -253,16 +247,10 @@ describe("mergeExtensionState", () => {
 
 		expect(result.experiments).toEqual({
 			powerSteering: true,
-			marketplace: false,
-			disableCompletionCommand: false,
-			concurrentFileReads: true,
 			multiFileApplyDiff: true,
 			preventFocusDisruption: false,
-			newTaskRequireTodos: false,
 			imageGeneration: false,
 			runSlashCommand: false,
-			nativeToolCalling: false,
-			metadataDrivenSubtasks: false,
 		})
 	})
 })