remove unused var

Author: Hyeoksu Lee

src/simulation/m_time_steppers.fpp

@@ -475,7 +475,6 @@ contains
 
         integer :: i, j, k, l, q, s !< Generic loop iterator
         real(wp) :: start, finish
-        integer :: dest
 
         call cpu_time(start)
         call nvtxStartRange("TIMESTEP")