Remove unused module.

relational-query/relational-query.cabal

@@ -60,7 +60,6 @@ library
                        Database.Relational.Query.Internal.AliasId
                        Database.Relational.Query.Internal.SQL
                        Database.Relational.Query.Internal.Product
-                       Database.Relational.Query.Monad.Trans.ListState
                        Database.Relational.Query.Monad.Trans.JoinState
                        Database.Relational.Query.Monad.Trans.RestrictingState
                        Database.Relational.Query.Monad.Qualify

relational-query/src/Database/Relational/Query/Monad/Trans/ListState.hs

@@ -1,32 +0,0 @@
--- |
--- Module      : Database.Relational.Query.Monad.Trans.ListState
--- Copyright   : 2013 Kei Hibino
--- License     : BSD3
---
--- Maintainer  : ex8k.hibino@gmail.com
--- Stability   : experimental
--- Portability : unknown
---
--- This module provides polymorphic list state definitions.
-module Database.Relational.Query.Monad.Trans.ListState (
-  TermsContext, primeTermsContext, appendTerm, termsList
-  ) where
-
-import Data.DList (DList, toList)
-import Data.Monoid (mempty, (<>))
-import Control.Applicative (pure)
-
--- | Type to accumulate terms.
-type TermsContext = DList
-
--- | Initial state for TermsContext.
-primeTermsContext :: TermsContext a
-primeTermsContext =  mempty
-
--- | Append a new term.
-appendTerm :: a -> TermsContext a -> TermsContext a
-appendTerm at ctx = ctx <> pure at
-
--- | Result term list.
-termsList :: TermsContext a -> [a]
-termsList =  toList