[hlint] Clean up language pragmas

* use LANGUAGE pragmas instead of deprecated one
* remove unused pragmas

4 files changed, 3 insertions, 4 deletions

diff --git a/lib/Numeric/GSL/Fourier.hs b/lib/Numeric/GSL/Fourier.hs
index 84943a0..22782b7 100644
--- a/lib/Numeric/GSL/Fourier.hs
+++ b/lib/Numeric/GSL/Fourier.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS_GHC -fglasgow-exts #-}
+{-# LANGUAGE ForeignFunctionInterface #-}
 -----------------------------------------------------------------------------
 {- |
 Module      : Numeric.GSL.Fourier
diff --git a/lib/Numeric/GSL/Minimization.hs b/lib/Numeric/GSL/Minimization.hs
index 3bbb2b3..729f383 100644
--- a/lib/Numeric/GSL/Minimization.hs
+++ b/lib/Numeric/GSL/Minimization.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS_GHC -fglasgow-exts #-}
+{-# LANGUAGE ForeignFunctionInterface #-}
 -----------------------------------------------------------------------------
 {- |
 Module      :  Numeric.GSL.Minimization
diff --git a/lib/Numeric/GSL/Polynomials.hs b/lib/Numeric/GSL/Polynomials.hs
index 0804c91..19e8944 100644
--- a/lib/Numeric/GSL/Polynomials.hs
+++ b/lib/Numeric/GSL/Polynomials.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS_GHC -fglasgow-exts #-}
+{-# LANGUAGE ForeignFunctionInterface #-}
 -----------------------------------------------------------------------------
 {- |
 Module      :  Numeric.GSL.Polynomials
diff --git a/lib/Numeric/GSL/Vector.hs b/lib/Numeric/GSL/Vector.hs
index e8df27c..40abfa8 100644
--- a/lib/Numeric/GSL/Vector.hs
+++ b/lib/Numeric/GSL/Vector.hs
@@ -1,4 +1,3 @@
-{-# OPTIONS_GHC -fglasgow-exts #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Numeric.GSL.Vector