Remove duplicated files in EvgenProdTools to avoid issues with ninja

Merged Tadej Novak requested to merge tadej/athena:gencmakefix into master

Remove duplicated files in EvgenProdTools:

  • G4particle_whitelist.txt was supposed to be moved in !41870 (merged) but there was another copy that was actually causing issues with ninja
  • susyParticlePdgid.txt is duplicated in the same way so only keep the version that is installed

/cc @ewelina, @jchapman, @akraszna (as you build with ninja regularly)

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