ED-PIC: Remove proton/neutron Number#39

RemiLehe merged 1 commit intoopenPMD:2.0.XopenPMD/openPMD-validator:2.0.Xfrom

ax3l:topic-noEDPICprotonNumax3l/openPMD-validator:topic-noEDPICprotonNumCopy head branch name to clipboard