Remove frog from the repository.

dart.gyp

Index: dart.gyp
diff --git a/dart.gyp b/dart.gyp
index 2c04adca7341fa39a9391cc1744947549b01c3b5..97eefa25a8e8f66e59a17c5624f8358e275265d0 100644
--- a/dart.gyp
+++ b/dart.gyp
@@ -36,9 +36,7 @@
           'action_name': 'create_sdk_py',
           'inputs': [
             '<!@(["python", "tools/list_files.py", "\\.dart$", "lib"])',
-            'frog/scripts/bootstrap/frogc',
             'tools/create_sdk.py',
-            '<(PRODUCT_DIR)/frog/bin/frog',
             '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)dart<(EXECUTABLE_SUFFIX)',
             '<(PRODUCT_DIR)/dart2js',
             '<(PRODUCT_DIR)/dart2js.bat',
@@ -100,11 +98,6 @@
       'type': 'none',
       'dependencies': [
         'utils/compiler/compiler.gyp:dart2js',
-
-        # TODO(ahe): Remove dependency on frog, it is just here to
-        # simplify frog/scripts/buildbot_annotated_steps.py
-        # temporarily.
-        'frog/dart-frog.gyp:frog',
       ],
     },
     {