remove all unused typedefs

since this was done in a semi-automatic way compilation for stuff not
used by the non-decoupled tests may be non-functional. I spared the
decoupled stuff because it does not compile ATM so I did not have a
way verify that it still works...

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@7371 2fb0f335-1f38-0410-981e-8018bf24f1b0