Fix issues with logtag
This fixes two warnings about unused functions in the absence of MPI found by @gruenich in #77 (comment 25594).
It also removes the function setLogtagRank(), which only had an extern declaration, but no implementation.
This fixes two warnings about unused functions in the absence of MPI found by @gruenich in #77 (comment 25594).
It also removes the function setLogtagRank(), which only had an extern declaration, but no implementation.