pkg/csslib: remove unused vars and fields

test/error_test.dart

 // Copyright (c) 2013, 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 error_test;
 
 import 'package:unittest/unittest.dart';
 import 'testing.dart';
 import 'package:csslib/src/messages.dart';
 
@@ skipping 215 matching lines @@
 }
 
 void testBadUnicode() {
   var errors = [];
   final String input = '''
 @font-face {
   src: url(fonts/BBCBengali.ttf) format("opentype");
   unicode-range: U+400-200;
 }''';
 
-  var stylesheet = parseCss(input, errors: errors);
+  parseCss(input, errors: errors);
 
   expect(errors.isEmpty, false);
   expect(errors[0].toString(),
       'error on line 3, column 20: unicode first range can not be greater than '
       'last\n'
       '  unicode-range: U+400-200;\n'
       '                   ^^^^^^^');
 
   final String input2 = '''
 @font-face {
   src: url(fonts/BBCBengali.ttf) format("opentype");
   unicode-range: U+12FFFF;
 }''';
 
-  stylesheet = parseCss(input2, errors: errors..clear());
+  parseCss(input2, errors: errors..clear());
 
   expect(errors.isEmpty, false);
   expect(errors[0].toString(),
       'error on line 3, column 20: unicode range must be less than 10FFFF\n'
       '  unicode-range: U+12FFFF;\n'
       '                   ^^^^^^');
 }
 
 void testBadNesting() {
   var errors = [];
 
   // Test for bad declaration in a nested rule.
   final String input = '''
 div {
   width: 20px;
   span + ul { color: blue; }
   span + ul > #aaaa {
     color: #ffghghgh;
   }
   background-color: red;
 }
 ''';
 
-  var stylesheet = parseCss(input, errors: errors);
+  parseCss(input, errors: errors);
   expect(errors.length, 1);
   var errorMessage = messages.messages[0];
   expect(errorMessage.message, contains('Bad hex number'));
   expect(errorMessage.span, isNotNull);
   expect(errorMessage.span.start.line, 4);
   expect(errorMessage.span.start.column, 11);
   expect(errorMessage.span.text, '#ffghghgh');
 
   // Test for bad selector syntax.
   final String input2 = '''
 div {
   span + ul #aaaa > (3333)  {
     color: #ffghghgh;
   }
 }
 ''';
-  var stylesheet2 = parseCss(input2, errors: errors..clear());
+  parseCss(input2, errors: errors..clear());
   expect(errors.length, 4);
   errorMessage = messages.messages[0];
   expect(errorMessage.message, contains(':, but found +'));
   expect(errorMessage.span, isNotNull);
   expect(errorMessage.span.start.line, 1);
   expect(errorMessage.span.start.column, 7);
   expect(errorMessage.span.text, '+');
 
   errorMessage = messages.messages[1];
   expect(errorMessage.message, contains('Unknown property value ul'));
@@ skipping 16 matching lines @@
   expect(errorMessage.span.start.column, 20);
   expect(errorMessage.span.text, '(');
 
   // Test for missing close braces and bad declaration.
   final String input3 = '''
 div {
   span {
     color: #green;
 }
 ''';
-  var stylesheet3 = parseCss(input3, errors: errors..clear());
+  parseCss(input3, errors: errors..clear());
   expect(errors.length, 2);
   errorMessage = messages.messages[0];
   expect(errorMessage.message, contains('Bad hex number'));
   expect(errorMessage.span, isNotNull);
   expect(errorMessage.span.start.line, 2);
   expect(errorMessage.span.start.column, 11);
   expect(errorMessage.span.text, '#green');
 
   errorMessage = messages.messages[1];
   expect(errorMessage.message, contains('expected }, but found end of file'));
   expect(errorMessage.span, isNotNull);
   expect(errorMessage.span.start.line, 3);
   expect(errorMessage.span.start.column, 1);
   expect(errorMessage.span.text, '\n');
 }
 
 main() {
   test('font-weight value errors', testUnsupportedFontWeights);
   test('line-height value errors', testUnsupportedLineHeights);
   test('bad selectors', testBadSelectors);
   test('bad Hex values', testBadHexValues);
   test('bad unicode ranges', testBadUnicode);
   test('nested rules', testBadNesting);
 }