Remove pre 2.4 code.
This patch removes all pre 2.4 related code.
@gruenich: Does this work for you. When the 2.5 branches are out we can adjust all DUNE_VERSION_NEWER macros to account for 2.5
This patch removes all pre 2.4 related code.
@gruenich: Does this work for you. When the 2.5 branches are out we can adjust all DUNE_VERSION_NEWER macros to account for 2.5