Remove an unused local variable in the test.

pkg/analyzer/test/src/task/inputs_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.src.task.inputs_test;
 
 import 'package:analyzer/src/task/inputs.dart';
 import 'package:analyzer/src/task/model.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:unittest/unittest.dart';
@@ skipping 546 matching lines @@
     builder.moveNext();
     String value = 'value';
     builder.currentValue = value;
     builder.moveNext();
     expect(builder.inputValue, value);
   }
 
   test_inputValue_afterCurrentValueNotAvailable() {
     SimpleTaskInputBuilder builder = new SimpleTaskInputBuilder(input);
     builder.moveNext();
-    String value = 'value';
     builder.currentValueNotAvailable();
     builder.moveNext();
     expect(builder.inputValue, isNull);
   }
 
   test_inputValue_afterOneMoveNext() {
     SimpleTaskInputBuilder builder = new SimpleTaskInputBuilder(input);
     builder.moveNext();
     expect(() => builder.inputValue, throwsStateError);
   }
@@ skipping 225 matching lines @@
   test_moveNext_withSet() {
     Map<String, TaskInput> inputDescriptors = {'one': input1};
     TopLevelTaskInputBuilder builder =
         new TopLevelTaskInputBuilder(inputDescriptors);
     expect(builder.moveNext(), true);
     builder.currentValue = 'value1';
     expect(builder.moveNext(), false);
     expect(builder.moveNext(), false);
   }
 }