Remove unnecessary second callback execution from user CLI stdin handlers

Author: ryanblock

src/cli/_stdin.js

@@ -1,7 +1,7 @@
 let { emitKeypressEvents } = require('readline')
 let sandbox = require('../')
 
-module.exports = function handleStdin (params, callback) {
+module.exports = function handleStdin (params) {
   let { rehydrate, update, watcher } = params
 
   // Listen for important keystrokes
@@ -47,7 +47,6 @@ module.exports = function handleStdin (params, callback) {
         update.err(err)
         process.exit(1)
       }
-      if (callback) callback()
       process.exit(0)
     })
   }

src/cli/index.js

@@ -39,6 +39,6 @@ module.exports = function cli (options, callback) {
     }
 
     // Handle stdin
-    stdin({ rehydrate, update, watcher }, callback)
+    stdin({ rehydrate, update, watcher })
   })
 }