cleanup code

lib/pages/customer/customer_list.dart

@@ -191,7 +191,7 @@ class _CustomerListState extends State<CustomerList> {
   }
 
   Widget getCount(User customer) {
-    return customer.fcsUnseenCount != null && customer.fcsUnseenCount > 0
+    return customer.fcsUnseenCount > 0
         ? Container(
             padding: const EdgeInsets.all(8.0),
             decoration:

lib/pages/customer/invitation_create.dart

@@ -146,10 +146,7 @@ class _InvitationCreateState extends State<InvitationCreate> {
   _invite() async {
     String userName = _nameController.text;
     String phoneNumber = dialCode + _phoneController.text;
-    if (userName == null ||
-        userName == "" ||
-        phoneNumber == null ||
-        phoneNumber == "") {
+    if (userName == "" || phoneNumber == "") {
       showMsgDialog(context, "Error", "Invalid name or phone number");
       return;
     }