How to delete input files after reading ?

Hi Everyone,
New forum user, so sorry if I do not respect some uses rules…and I’m French by the way, so sorry about my bad English level too…;-)
I use Nxlog in the following context :
A machine A send periodically a file on a machine B (same file name)
Machine B is used like a first level of log centralization. Nxlog is installed on it
Then, Nxlog send log to Machine C who host Logstash
I’m looking for a process who remove input files after end of reading and processing, but I’m not sure about how process “in-out” operate, is-it after each line or after a n entire file reading ?
How can I test a “end of reading” condition ?
Right now, I’m going to test something like that :
<Extension fileop>
 Module xm_fileop
</Extension>

<Input in>
    Module im_file
    SavePos TRUE
    ReadFromLast TRUE
    PollInterval 900 # 15mn
    File "/var/log/inpufile*.log"
 Exec $InputFileName1 = file_name()
</Input>

<Output logstash>
    Module om_tcp
 Port 6002
Host 10.x.y.z
Exec file_remove($InputFileName1);
</Output>

<Route 1>
    Path in => logstash
</Route>

Is it correct ?

Thanks in advance for your help