push (location: RawLocation, onComplete?: Function, onAbort?: Function) {
+    this.history.push(location, onComplete, onAbort)
-    // $flow-disable-line
-    if (!onComplete && !onAbort && typeof Promise !== 'undefined') {
-      return new Promise((resolve, reject) => {
-        this.history.push(location, resolve, reject)
-      })
-    } else {
-      this.history.push(location, onComplete, onAbort)
-    }
  }