fix include options test on windows

pkg/analyzer/test/source/analysis_options_provider_test.dart

Index: pkg/analyzer/test/source/analysis_options_provider_test.dart
diff --git a/pkg/analyzer/test/source/analysis_options_provider_test.dart b/pkg/analyzer/test/source/analysis_options_provider_test.dart
index 5c9d1d29a3e1cf93a4cec583d2599c2408d0f58d..8ada91cfb8aaef067974b5a71101b48ae61b50f9 100644
--- a/pkg/analyzer/test/source/analysis_options_provider_test.dart
+++ b/pkg/analyzer/test/source/analysis_options_provider_test.dart
@@ -193,10 +193,6 @@ analyzer:
   }
 
   void test_getOptions_include() {
-    if (isWindows) {
-      // TODO(danrubel) fix on Windows.
-      return;
-    }
     pathTranslator.newFile(
         '/foo.include',
         r'''
@@ -208,7 +204,7 @@ analyzer:
     pathTranslator.newFile(
         '/$optionsFileName',
         r'''
-include: /foo.include
+include: foo.include
 ''');
     Map<String, YamlNode> options = _getOptions('/');
     expect(options, hasLength(1));