Remove duplicated stack trace from error notifications

pkg/analysis_server/lib/src/analysis_logger.dart

 // Copyright (c) 2014, 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 analysis.logger;
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:logging/logging.dart' as logging;
@@ skipping 25 matching lines @@
     });
   }
 
   @override
   void logError(String message, [CaughtException exception]) {
     if (exception == null) {
       baseLogger.severe(message);
     } else {
       baseLogger.severe(message, exception.exception, exception.stackTrace);
     }
-    server.sendServerErrorNotification(
-        message, exception, exception?.stackTrace);
+    server.sendServerErrorNotification(message, exception, null);
   }
 
   @override
   void logError2(String message, Object exception) {
     baseLogger.severe(message, exception);
   }
 
   @override
   void logInformation(String message, [CaughtException exception]) {
     if (exception == null) {
       baseLogger.info(message);
     } else {
       baseLogger.info(message, exception.exception, exception.stackTrace);
     }
   }
 
   @override
   void logInformation2(String message, Object exception) {
     baseLogger.info(message, exception);
   }
 }