Remove legacy export

Author: ai

packages/size-limit/index.js

@@ -1,5 +1,3 @@
-import fs from 'node:fs/promises'
-
 import calc from './calc.js'
 import { Plugins } from './load-plugins.js'
 
@@ -31,7 +29,3 @@ export default async function (plugins, files) {
     return value
   })
 }
-
-export async function rm(dir) {
-  await fs.rm(dir, { force: true, recursive: true })
-}