Made requested change

ThaDaVos · web-flow · commit 206bac009f95 · 2018-03-22T11:35:10.000+01:00
diff --git a/src/vuedraggable.js b/src/vuedraggable.js
@@ -128,7 +128,7 @@
       },
 
       beforeDestroy() {
-        if(this._sortable !== null && this._sortable !== undefined) this._sortable.destroy();
+        if(this._sortable !== undefined) this._sortable.destroy();
       },
 
       computed: {
