Remove addFile() invocations in analyzer_cli.

pkg/analyzer_cli/lib/src/analyzer_impl.dart

Index: pkg/analyzer_cli/lib/src/analyzer_impl.dart
diff --git a/pkg/analyzer_cli/lib/src/analyzer_impl.dart b/pkg/analyzer_cli/lib/src/analyzer_impl.dart
index 8617cdee32e99af4a88cb22c4450d4db24469b3a..a4c18310f679203ceaae2e43861d8355ad1569bd 100644
--- a/pkg/analyzer_cli/lib/src/analyzer_impl.dart
+++ b/pkg/analyzer_cli/lib/src/analyzer_impl.dart
@@ -128,7 +128,6 @@ class AnalyzerImpl {
       for (Source source in sources) {
         if (analysisDriver != null) {
           String path = source.fullName;
-          analysisDriver.addFile(path);
           ErrorsResult errorsResult = await analysisDriver.getErrors(path);
           errorInfos.add(new AnalysisErrorInfoImpl(
               errorsResult.errors, errorsResult.lineInfo));