[xi] Remove requested Dart dependencies.

They are not used anymore.

Change-Id: Ifa72380f8a85fb8d0ddad08e60177d887cf3c3c8
diff --git a/bin/xi/dart_dependencies.yaml b/bin/xi/dart_dependencies.yaml
deleted file mode 100644
index dfffbc0..0000000
--- a/bin/xi/dart_dependencies.yaml
+++ /dev/null
@@ -1,7 +0,0 @@
-# Copyright 2017 The Fuchsia Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-name: xi
-dependencies:
-  path_provider: 0.2.1+1