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

packages/api-client/src/features/canary-cookie.ts

@@ -1,37 +0,0 @@
-import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature'
-
-export const LABRINTH_CANARY_COOKIE = 'labrinth-canary=always'
-
-export interface CanaryCookieConfig extends FeatureConfig {
-	getCookie?: () => string | undefined | Promise<string | undefined>
-}
-
-export class CanaryCookieFeature extends AbstractFeature {
-	declare protected config: CanaryCookieConfig
-
-	constructor(config?: CanaryCookieConfig) {
-		super(config)
-	}
-
-	shouldApply(context: Parameters<AbstractFeature['shouldApply']>[0]): boolean {
-		return super.shouldApply(context) && context.options.api === 'labrinth'
-	}
-
-	async execute<T>(next: () => Promise<T>, context: Parameters<AbstractFeature['execute']>[1]) {
-		const cookie = this.config.getCookie ? await this.config.getCookie() : LABRINTH_CANARY_COOKIE
-		if (!cookie) {
-			return next()
-		}
-
-		const headers = { ...(context.options.headers ?? {}) }
-		const existingCookie = headers.cookie ?? headers.Cookie
-
-		if (!existingCookie?.split('; ').includes(cookie)) {
-			headers.cookie = existingCookie ? `${existingCookie}; ${cookie}` : cookie
-			delete headers.Cookie
-			context.options.headers = headers
-		}
-
-		return next()
-	}
-}

packages/api-client/src/index.ts

@@ -9,11 +9,6 @@ export {
 } from './core/abstract-websocket'
 export { ModrinthApiError, ModrinthServerError } from './core/errors'
 export { type AuthConfig, AuthFeature } from './features/auth'
-export {
-	type CanaryCookieConfig,
-	CanaryCookieFeature,
-	LABRINTH_CANARY_COOKIE,
-} from './features/canary-cookie'
 export {
 	type CircuitBreakerConfig,
 	CircuitBreakerFeature,