[dart][fuchsia_scenic_flutter] delete an unused dep

Change-Id: Ic1294dbae7aa86dde140578e6ec942b83d0cd9fb
diff --git a/public/dart/fuchsia_scenic_flutter/BUILD.gn b/public/dart/fuchsia_scenic_flutter/BUILD.gn
index 5685585..b240baf 100644
--- a/public/dart/fuchsia_scenic_flutter/BUILD.gn
+++ b/public/dart/fuchsia_scenic_flutter/BUILD.gn
@@ -24,7 +24,6 @@
     "//sdk/fidl/fuchsia.ui.views",
     "//third_party/dart-pkg/git/flutter/packages/flutter",
     "//third_party/dart-pkg/pub/meta",
-    "//topaz/public/dart/fuchsia_logger",
   ]
 }