Remove the methods boundaryMatrixHeatFlux, markVertexRed and relativeErrorVertex from ImplicitSpatialParams, ImplicitAssembler and ImplicitModel, respectively. They have been deprecated in 2.3, in favor of using thermalConductivitySolid, markDofRed and relativeErrorDof, respectively. Correct CHANGELOG correspondingly.

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@10394 2fb0f335-1f38-0410-981e-8018bf24f1b0