updated ranking formula

src/lib/server/db/schema.ts

@@ -1,7 +1,5 @@
 import { integer, sqliteTable, text, index, unique } from 'drizzle-orm/sqlite-core';
 
-import { sql } from 'drizzle-orm';
-
 export const user = sqliteTable('user', { id: text('id').primaryKey(), age: integer('age') });
 
 export const session = sqliteTable('session', {