Remove unnecessary uses of -XCPP

src/Data/Singletons/CustomStar.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE DataKinds, TypeFamilies, KindSignatures, TemplateHaskell, CPP #-}
+{-# LANGUAGE DataKinds, TypeFamilies, KindSignatures, TemplateHaskell #-}
 
 -----------------------------------------------------------------------------
 -- |

src/Data/Singletons/Single.hs

@@ -6,7 +6,7 @@ [email protected]
 This file contains functions to refine constructs to work with singleton
 types. It is an internal module to the singletons package.
 -}
-{-# LANGUAGE TemplateHaskell, TupleSections, ParallelListComp, CPP #-}
+{-# LANGUAGE TemplateHaskell, TupleSections, ParallelListComp #-}
 
 module Data.Singletons.Single where
 

src/Data/Singletons/TH.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE ExplicitNamespaces, CPP #-}
+{-# LANGUAGE ExplicitNamespaces #-}
 
 -----------------------------------------------------------------------------
 -- |

tests/SingletonsTestSuiteUtils.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DerivingStrategies #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}