fix: remove debugger (#4222)

A `debugger` instruction was left after #4090

Author: cexbrayat

packages/@vue/cli-plugin-typescript/generator/index.js

@@ -3,7 +3,6 @@ module.exports = (api, {
   tsLint,
   lintOn = []
 }, _, invoking) => {
-  debugger
   if (typeof lintOn === 'string') {
     lintOn = lintOn.split(',')
   }