Remove function syncP2FunctionBetweenPrimitives()
The function is not really needed as we can also sync P2Functions via syncFunctionBetweenPrimitives()
.
MR also removes syncVectorFunctionBetweenPrimitives()
for dg::DGVectorFunction
which was not operational and only showed up in the cpp-file. This remained undetected as there was also no explicit instantiation
Edited by Marcus Mohr