style: remove redundant imports

Author: rafamizes

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Dart Package Versioning](https://dart.dev/tools/pub
 
 ### Fixed
 
+- remove redundant imports.
 - running demo app on Android — [146](https://github.com/dartoos-dev/formdator/issues/146).
 
 ## [0.12.1] - 2021-09-07

lib/src/brazil/req_cnpj.dart

@@ -1,4 +1,5 @@
-import 'package:formdator/formdator.dart';
+import '../core/pair.dart';
+import '../core/req.dart';
 import 'cnpj.dart';
 
 /// Required CNPJ - Cadastro Nacional de Pessoa Jurídica.

lib/src/net/req_email.dart

@@ -1,9 +1,12 @@
-import 'package:formdator/formdator.dart';
+import '../core/pair.dart';
+import '../core/req.dart';
+import '../type.dart';
+
 import 'email.dart';
 
-/// Convenient validator for required email fields.
+/// Convenience validator for required email fields.
 ///
-/// It is the composite of [Req] and [Email] validators.
+/// It is the composition between validators [Req] and [Email].
 class ReqEmail {
  /// Non-blank and well-formed email values.
  ///