Fix warnings for 0.7.6

Author: garyb

src/DOM/Event/DragEvent/DataTransfer.purs

@@ -1,6 +1,6 @@
 module DOM.Event.DragEvent.DataTransfer where
 
-import DOM.File.Types (FileList)
+import DOM.File.Types (FileList())
 
 foreign import data DataTransfer :: *
 

src/DOM/HTML/HTMLMediaElement/CanPlayType.purs

@@ -7,8 +7,6 @@ module DOM.HTML.HTMLMediaElement.CanPlayType
   ) where
 
 import Prelude
-import Data.Maybe (Maybe(..))
-import Data.Enum (Enum, Cardinality(..), defaultSucc, defaultPred)
 
 newtype CanPlayType = CanPlayType String