(TBR) Fix a broken test

pkg/analysis_server/test/analysis/get_navigation_test.dart

Index: pkg/analysis_server/test/analysis/get_navigation_test.dart
diff --git a/pkg/analysis_server/test/analysis/get_navigation_test.dart b/pkg/analysis_server/test/analysis/get_navigation_test.dart
index b5c224e43233b6e1850bcbae820cfb52ecf453eb..1de99e44b4b3c408b8501ce11e26af2cb1bfe75b 100644
--- a/pkg/analysis_server/test/analysis/get_navigation_test.dart
+++ b/pkg/analysis_server/test/analysis/get_navigation_test.dart
@@ -82,7 +82,7 @@ main() {
     // remove context, causes sending an "invalid file" error
     {
       Folder projectFolder = resourceProvider.getResource(projectPath);
-      server.contextDirectoryManager.removeContext(projectFolder);
+      server.contextManager.removeContext(projectFolder);
     }
     // wait for an error response
     Response response = await serverChannel.waitForResponse(request);