remove caching from /api/v1/instance

backend/test/mastodon.spec.ts

@@ -35,7 +35,6 @@ describe('Mastodon APIs', () => {
 			assert.equal(res.status, 200)
 			assertCORS(res)
 			assertJSON(res)
-			assertCache(res, 180)
 
 			{
 				const data = await res.json<any>()

functions/api/v1/instance.ts

@@ -12,7 +12,6 @@ export async function handleRequest(domain: string, db: D1Database) {
 		'Access-Control-Allow-Origin': '*',
 		'Access-Control-Allow-Headers': 'content-type, authorization',
 		'content-type': 'application/json; charset=utf-8',
-		'cache-control': 'max-age=180, public',
 	}
 
 	const query = `