remove displayEmptyReadOnlySession from closeFile

fixed standard

src/app/files/fileManager.js

@@ -103,7 +103,6 @@ class FileManager extends Plugin {
   closeFile (name) {
     delete this.openedFiles[name]
     if (!Object.keys(this.openedFiles).length) {
-      this.editor.displayEmptyReadOnlySession()
       this._deps.config.set('currentFile', '')
       this.events.emit('noFileSelected')
     }

src/app/panels/tab-proxy.js

@@ -140,7 +140,7 @@ export class TabProxy {
   removeTab (name) {
     this._view.filetabs.removeTab(name)
     delete this._handlers[name]
-    this.switchToActiveTab ()
+    this.switchToActiveTab()
   }
 
   addHandler (type, fn) {