Revert "Derive Functor, Foldable, and Traversable using pragmas."

This reverts commit 949f9cab01bc57b892e8b33dc244846c7cf05004.

src/Diff.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE DeriveFunctor, DeriveFoldable #-}
 module Diff where
 
 import Syntax

src/Line.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE DeriveFunctor, DeriveFoldable, FlexibleInstances #-}
+{-# LANGUAGE FlexibleInstances #-}
 module Line where
 
 import qualified Data.Foldable as Foldable

src/Operation.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE DeriveFunctor #-}
 module Operation where
 
 import Diff

src/OrderedMap.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE DeriveFunctor, DeriveFoldable, DeriveTraversable #-}
 module OrderedMap (
     OrderedMap
   , fromList

src/Patch.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE DeriveFunctor #-}
 module Patch where
 
 data Patch a =

src/Row.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE DeriveFunctor #-}
 module Row where
 
 import Line

src/Source.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE DeriveFunctor, DeriveFoldable, DeriveTraversable #-}
+
 module Source where
 
 import Range

src/Syntax.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE DeriveFunctor, DeriveFoldable, DeriveTraversable #-}
 module Syntax where
 
 import OrderedMap