fortran: remove 2 unused files

As noted in the comments of these files, they aren't used.  Instead,
the Fortran interfaces for WTICK/WTIME just BIND(C) invoke the
back-end C functions (yay BIND(C)!).  Hence, there's no need to keep
these old wrapper files around any more.

cmr=v1.8.3

This commit was SVN r32751.

ompi/mpi/fortran/use-mpi-f08/wtick_f08.F90

@@ -1,12 +0,0 @@
-! This wrapper for MPI_Wtick is not actually used in this version.
-! See mpi-f08-interfaces.F90 where the C implementation is called
-! directly.
-!
-function MPI_Wtick_f08()
-   use :: mpi_f08, only : ompi_wtick_f
-   implicit none
-   DOUBLE PRECISION :: MPI_Wtick_f08
-
-   MPI_Wtick_f08 = ompi_wtick_f()
-
-end function MPI_Wtick_f08

ompi/mpi/fortran/use-mpi-f08/wtime_f08.F90

@@ -1,12 +0,0 @@
-! This wrapper for MPI_Wtime is not actually used in this version.
-! See mpi-f08-interfaces.F90 where the C implementation is called
-! directly.
-!
-function MPI_Wtime_f08()
-   use :: mpi_f08, only : ompi_wtime_f
-   implicit none
-   DOUBLE PRECISION :: MPI_Wtime_f08
-
-   MPI_Wtime_f08 = ompi_wtime_f()
-
-end function MPI_Wtime_f08