remove typescript code

src/components/Login/LoginTab.js

@@ -6,7 +6,7 @@ const { TabPane } = Tabs;
 
 const generateId = (() => {
   let i = 0;
-  return (prefix: string = '') => {
+  return (prefix = '') => {
     i += 1;
     return `${prefix}${i}`;
   };