Remove unacessary entry when reloading simulation
When reloading simulation after none wanted stop none relevant line can be present in file_nl_conv file_c_conv as backup are only made at each time step. Therefore fix loop output of not finish time loop can be present in these files that are not wanted anymore.
This does not impact the results need more post processing when using these files.
Could be nice to detect those line and remove them when reloading.