Remove bindings-dart

sky/engine/bindings-dart/core/dart/dart-native-extensions.gypi

Index: sky/engine/bindings-dart/core/dart/dart-native-extensions.gypi
diff --git a/sky/engine/bindings-dart/core/dart/dart-native-extensions.gypi b/sky/engine/bindings-dart/core/dart/dart-native-extensions.gypi
deleted file mode 100644
index c8f009e8a0ec1d563f232b53910f9cb8368083a5..0000000000000000000000000000000000000000
--- a/sky/engine/bindings-dart/core/dart/dart-native-extensions.gypi
+++ /dev/null
@@ -1,25 +0,0 @@
-{
-  'variables': {
-    # We have to nest variables inside variables so that they can be overridden
-    # through GYP_DEFINES.
-    'variables': {
-      'enable_dart_native_extensions%': 0,
-    },
-
-    'dart_dir': '../../../../../../dart',
-
-    'conditions': [
-      ['enable_dart_native_extensions==1', {
-        'additional_target_deps': [
-          # Reference Dart from a shared library which can be used outside of Dartium
-          '../bindings/core/dart/dart-native-extensions.gyp:dart_library',
-        ],
-      }, {
-        'additional_target_deps': [
-          # Link in Dart directly
-          '<(dart_dir)/runtime/dart-runtime.gyp:libdart',
-        ],
-      }],
-    ],
-  },
-}