Removed fixed dependencies

packages/csslib/test/samples_test.dart

+@TestOn('vm')
+library samples_test;
+
+import 'dart:io';
+import 'dart:mirrors';
+
+import 'package:test/test.dart';
+import 'package:csslib/parser.dart';
+
+const testOptions = const PreprocessorOptions(
+    useColors: false,
+    checked: false,
+    warningsAsErrors: true,
+    inputFile: 'memory');
+
+void testCSSFile(File cssFile) {
+  final errors = <Message>[];
+  final css = cssFile.readAsStringSync();
+  final stylesheet = parse(css, errors: errors, options: testOptions);
+
+  expect(stylesheet, isNotNull);
+  expect(errors, isEmpty, reason: errors.toString());
+}
+
+main() {
+  final libraryUri = currentMirrorSystem().findLibrary(#samples_test).uri;
+  final cssDir = new Directory.fromUri(libraryUri.resolve('examples'));
+  for (var element in cssDir.listSync())
+    if (element is File && element.uri.pathSegments.last.endsWith('.css')) {
+      test(element.uri.pathSegments.last, () => testCSSFile(element));
+    }
+}