Remove unused import (#309)

diff --git a/packages/fuchsia_ctl/lib/src/emulator.dart b/packages/fuchsia_ctl/lib/src/emulator.dart
index b455b38..1e23647 100644
--- a/packages/fuchsia_ctl/lib/src/emulator.dart
+++ b/packages/fuchsia_ctl/lib/src/emulator.dart
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:io';
-
 import 'package:file/file.dart';
 import 'package:file/local.dart';
 import 'package:meta/meta.dart';