removing unneeded import 'show's

R=nweiz@google.com

Review URL: https://codereview.chromium.org//1952893005 .
diff --git a/test/iterable_matchers_test.dart b/test/iterable_matchers_test.dart
index 4d302c2..faab916 100644
--- a/test/iterable_matchers_test.dart
+++ b/test/iterable_matchers_test.dart
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:matcher/matcher.dart';
-import 'package:test/test.dart' show test, group;
+import 'package:test/test.dart';
 
 import 'test_utils.dart';
 
diff --git a/test/mirror_matchers_test.dart b/test/mirror_matchers_test.dart
index 5aa6a75..50f786b 100644
--- a/test/mirror_matchers_test.dart
+++ b/test/mirror_matchers_test.dart
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:matcher/mirror_matchers.dart';
-import 'package:test/test.dart' show test;
+import 'package:test/test.dart';
 
 import 'test_utils.dart';
 
diff --git a/test/numeric_matchers_test.dart b/test/numeric_matchers_test.dart
index 3a5eb2c..4065f3e 100644
--- a/test/numeric_matchers_test.dart
+++ b/test/numeric_matchers_test.dart
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:matcher/matcher.dart';
-import 'package:test/test.dart' show test, group;
+import 'package:test/test.dart';
 
 import 'test_utils.dart';
 
diff --git a/test/order_matchers_test.dart b/test/order_matchers_test.dart
index 47ce3c5..a2d60e8 100644
--- a/test/order_matchers_test.dart
+++ b/test/order_matchers_test.dart
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:matcher/matcher.dart';
-import 'package:test/test.dart' show test;
+import 'package:test/test.dart';
 
 import 'test_utils.dart';
 
diff --git a/test/string_matchers_test.dart b/test/string_matchers_test.dart
index 9a61cb0..cab8693 100644
--- a/test/string_matchers_test.dart
+++ b/test/string_matchers_test.dart
@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:matcher/matcher.dart';
-import 'package:test/test.dart' show test, group, expect;
+import 'package:test/test.dart' show test, expect;
 
 import 'test_utils.dart';