Revert last canary flag PR and use a better method (#5535)

* Revert "Implement Labrinth Canary API flag (#5531)"

This reverts commit 3b21944a75.

* Use Labrinth-Canary header instead of cookie for API canary

* prepr

* fix rebase

apps/frontend/src/server/utils/api-client.ts

@@ -1,9 +1,7 @@
 import {
 	type AuthConfig,
 	AuthFeature,
-	CanaryCookieFeature,
 	type FeatureConfig,
-	LABRINTH_CANARY_COOKIE,
 	type NuxtClientConfig,
 	NuxtModrinthClient,
 } from '@modrinth/api-client'
@@ -22,7 +20,6 @@ async function getRateLimitKeyFromSecretsStore(): Promise<string | undefined> {
 export interface ServerModrinthClientOptions {
 	event?: H3Event
 	authToken?: string
-	canaryCookie?: boolean
 }
 
 export function useServerModrinthClient(options?: ServerModrinthClientOptions): NuxtModrinthClient {
@@ -40,10 +37,6 @@ export function useServerModrinthClient(options?: ServerModrinthClientOptions):
 		)
 	}
 
-	if (options?.canaryCookie) {
-		features.push(new CanaryCookieFeature({ getCookie: () => LABRINTH_CANARY_COOKIE }))
-	}
-
 	const clientConfig: NuxtClientConfig = {
 		labrinthBaseUrl: apiBaseUrl,
 		rateLimitKey: config.rateLimitKey || getRateLimitKeyFromSecretsStore,