[flutter] Actually remove the ICU header.

Bug: DX-1070
Change-Id: Idd9479969c0bf2fd400f3e5b89437fa79324b915
diff --git a/runtime/flutter_runner/runner.cc b/runtime/flutter_runner/runner.cc
index 46a5ad9..652a298 100644
--- a/runtime/flutter_runner/runner.cc
+++ b/runtime/flutter_runner/runner.cc
@@ -15,7 +15,6 @@
 #include "fuchsia_font_manager.h"
 #include "lib/fsl/vmo/file.h"
 #include "lib/fsl/vmo/sized_vmo.h"
-#include "lib/icu_data/cpp/icu_data.h"
 #include "third_party/flutter/runtime/dart_vm.h"
 #include "third_party/icu/source/common/unicode/udata.h"
 #include "third_party/skia/include/core/SkGraphics.h"