Move RelC class from HPath.Internal to HPath

src/HPath/Internal.hs

@@ -3,8 +3,7 @@
 -- | Internal types and functions.
 
 module HPath.Internal
-  (Path(..)
-  ,RelC)
+  (Path(..))
   where
 
 import Control.DeepSeq (NFData (..))
@@ -50,6 +49,3 @@ instance Show (Path b) where
 instance NFData (Path b) where
   rnf (MkPath x) = rnf x
 
-
-class RelC m
-