Remove duplicate import

Author: Sasa Bogicevic

servant/src/Servant/Utils/Links.hs

@@ -109,8 +109,6 @@ import           Data.Singletons.Bool
                  (SBool (..), SBoolI (..))
 import qualified Data.Text                     as Text
 import qualified Data.Text.Encoding            as TE
-import           Data.Type.Bool
-                 (If)
 import           Data.Type.Bool
                  (If)
 import           GHC.TypeLits