Remove unused imports

Author: garyb

src/Data/Lens/Index.purs

@@ -5,9 +5,9 @@ module Data.Lens.Index
 
 import Prelude
 
-import Data.Identity (Identity(..))
+import Data.Identity (Identity())
 import Data.Map as M
-import Data.Maybe (maybe, fromMaybe, Maybe(..))
+import Data.Maybe (Maybe(), maybe, fromMaybe)
 import Data.Set as S
 import Data.StrMap as SM
 import Data.Array as A

src/Data/Lens/Lens/Tuple.purs

@@ -1,4 +1,4 @@
-module Data.Lens.Lens.Tuple 
+module Data.Lens.Lens.Tuple
   ( _1
   , _2
   , module Data.Profunctor.Strong

src/Data/Lens/Prism/Either.purs

@@ -6,8 +6,8 @@ module Data.Lens.Prism.Either
 
 import Prelude
 
-import Data.Either (Either(..))
-import Data.Lens.Prism (Prism(), prism)
+import Data.Either (Either())
+import Data.Lens.Prism (Prism())
 import Data.Profunctor.Choice (left, right)
 
 -- | Prism for the `Left` constructor of `Either`.