Remove import

Author: elliette

dwds/test/fixtures/context.dart

@@ -9,7 +9,6 @@ import 'package:build_daemon/client.dart';
 import 'package:build_daemon/data/build_status.dart';
 import 'package:build_daemon/data/build_target.dart';
 import 'package:dwds/asset_reader.dart';
-import 'package:dwds/expression_compiler.dart';
 import 'package:dwds/src/config/tool_configuration.dart';
 import 'package:dwds/src/connections/app_connection.dart';
 import 'package:dwds/src/connections/debug_connection.dart';