Adapt cabal file

haddock.cabal

@@ -26,26 +26,6 @@ extra-source-files:
   doc/docbook-xml.mk
   doc/fptools.css
   doc/haddock.xml
-  examples/A.hs
-  examples/B.hs
-  examples/Bug1.hs
-  examples/Bug2.hs
-  examples/Bug3.hs
-  examples/Bug4.hs
-  examples/Bug6.hs
-  examples/Bug7.hs
-  examples/Bug8.hs
-  examples/Bug9.hs
-  examples/Hash.hs
-  examples/Hidden.hs
-  examples/Makefile
-  examples/NoLayout.hs
-  examples/Test.hs
-  examples/Visible.hs
-  examples/hide-bug/A.hs
-  examples/hide-bug/B.hs
-  examples/hide-bug/C.hs
-  examples/hide-bug/D.hs
   haddock.spec
   haskell.vim
   src/haddock.sh