remove model window assignments

src/models/request/passwordHintRequest.ts

@@ -1,10 +1,7 @@
-class PasswordHintRequest {
+export class PasswordHintRequest {
     email: string;
 
     constructor(email: string) {
         this.email = email;
     }
 }
-
-export { PasswordHintRequest };
-(window as any).PasswordHintRequest = PasswordHintRequest;