Remove unused files...

inject.c

-#include <stdio.h>
-
-/* Injection of MPI_Isends and MPI_Irecvs into the queues. */
-void inject_one(void) {}

readlog.c

-#include <stdio.h>
-
-/**
- * @brief read the output from a run of SWIFT with the MPI communication
- * logger enabled.
- *
-void mpistalls_readlog(void) {
-
-
-
-}