fix(layout): disable offset directive

use the new `flex-offset` directive and remove the deprecated `offset` directive.

Author: ThomasBurleson

src/core/services/layout/layout.js

@@ -106,13 +106,6 @@
     .directive('flexOrderLg', attributeWithObserve('flex-order-lg'))
     .directive('flexOrderGtLg', attributeWithObserve('flex-order-gt-lg'))
 
-    .directive('offset', attributeWithObserve('flex-offset'))
-    .directive('offsetSm', attributeWithObserve('flex-offset-sm'))
-    .directive('offsetGtSm', attributeWithObserve('flex-offset-gt-sm'))
-    .directive('offsetMd', attributeWithObserve('flex-offset-md'))
-    .directive('offsetGtMd', attributeWithObserve('flex-offset-gt-md'))
-    .directive('offsetLg', attributeWithObserve('flex-offset-lg'))
-    .directive('offsetGtLg', attributeWithObserve('flex-offset-gt-lg'))
     .directive('flexOffset', attributeWithObserve('flex-offset'))
     .directive('flexOffsetSm', attributeWithObserve('flex-offset-sm'))
     .directive('flexOffsetGtSm', attributeWithObserve('flex-offset-gt-sm'))