make sure "remove" return a promise

apps/remix-ide/src/app/files/fileProvider.js

@@ -157,12 +157,13 @@ class FileProvider {
    * @param {*} path is the folder to be removed
    */
   remove (path) {
+    return new Promise((resolve, reject) => {
       path = this.removePrefix(path)
       if (window.remixFileSystem.existsSync(path)) {
         const stat = window.remixFileSystem.statSync(path)
         try {
           if (!stat.isDirectory()) {
-          return this.removeFile(path)
+            resolve(this.removeFile(path))
           } else {
             const items = window.remixFileSystem.readdirSync(path)
             if (items.length !== 0) {
@@ -182,10 +183,11 @@ class FileProvider {
           }
         } catch (e) {
           console.log(e)
-        return false
+          return resolve(false)
         }
       }
-    return true
+      return resolve(true)
+    })
   }
 
   removeFile (path) {

apps/remix-ide/src/app/files/remixDProvider.js

@@ -130,19 +130,22 @@ module.exports = class RemixDProvider {
   }
 
   remove (path) {
+    return new Promise((resolve, reject) => {
     const unprefixedpath = this.removePrefix(path)
-    
     this._appManager.call('remixd', 'remove', { path: unprefixedpath })
     .then(result => {
       console.log('result: ', result)
       const path = this.type + '/' + unprefixedpath
 
       delete this.filesContent[path]
+        resolve(true)
       this.init(() => {
         this.event.trigger('fileRemoved', [path])
       })
     }).catch(error => {
       if (error) console.log(error)
+        resolve(false)
+    })
     })
   }