revert the ghc doc index changes back to just using a (now optional) cronjob

The overhead to re-indexing in posttrans and postun seems too high

ghc-rpm-macros.ghc

@@ -218,27 +218,9 @@ This package contains the development files.
 %define basepkg ghc-%{pkgname}\
 %post -n %{basepkg}-devel\
 %ghc_pkg_recache\
-if [ -d %{_localstatedir}/lib/rpm-state/ghc/ ]; then\
-  touch %{_localstatedir}/lib/rpm-state/ghc/haddock-reindex\
-fi\
 \
 %postun -n %{basepkg}-devel\
-%ghc_pkg_recache\
-if [ $1 -gt 1 ] ; then\
-  if [ -d %{_localstatedir}/lib/rpm-state/ghc/ ]; then\
-    touch %{_localstatedir}/lib/rpm-state/ghc/haddock-reindex\
-  fi\
-else\
-  cd %{ghcdocbasedir}/libraries\
-  ./gen_contents_index >/dev/null\
-fi\
-\
-%posttrans -n %{basepkg}-devel\
-if [ -f %{_localstatedir}/lib/rpm-state/ghc/haddock-reindex ]; then\
-  cd %{ghcdocbasedir}/libraries\
-  ./gen_contents_index >/dev/null\
-  rm %{_localstatedir}/lib/rpm-state/ghc/haddock-reindex\
-fi
+%ghc_pkg_recache
 
 # ghc_package_devel [-c cdepslist] [-h pkgdepslist] [-l licensetag] [name] [version]
 %ghc_package_devel(c:h:l:)\