Extensions24.hs.refact

[("tests/examples/Extensions24.hs:1:1: Error: Unused LANGUAGE pragma\nFound:\n  {-# LANGUAGE GeneralizedNewtypeDeriving #-}\nWhy not remove it.\n",[ModifyComment {pos = SrcSpan {startLine = 1, startCol = 1, endLine = 1, endCol = 44}, newComment = ""}])]