Undo common.gypi change for Blink scroll change

Once https://codereview.chromium.org/18539017/ lands, then this
variable is a no-op.

R=jamesr@chromium.org
BUG=256381

Review URL: https://chromiumcodereview.appspot.com/18689008

git-svn-id: http://src.chromium.org/svn/trunk/src/build@211685 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -1099,9 +1099,6 @@
     'android_app_version_name%': 'Developer Build',
     'android_app_version_code%': 0,
 
-    # TODO(enne): Remove this once #ifdefs have been removed in Blink.
-    'blink_scrolling_position_no_offset%': 1,
-
     # Contains data about the attached devices for gyp_managed_install.
     'build_device_config_path': '<(PRODUCT_DIR)/build_devices.cfg',