Fix import statements

Remove unused or unneeded imports and change imports of luxon APIs to
use the wrapper.

server/api/events.ts

@@ -1,6 +1,5 @@
 import { pipeline } from "node:stream";
 import { addStream, deleteStream } from "~/server/streams";
-import { readUsers } from "~/server/database";
 
 export default defineEventHandler(async (event) => {
 	const session = await getServerSession(event);