Unnecessary warning and error in simulations which do not require the system config systemConfigBlueprint.xml

The PCM example does not require the file systemConfigBlueprint.xml in any of its input files. After removing this unnecessary file from my configs directory, the simulation (based on the last build of the develop branch) ran successfully, but showed an unnecessary warning:
I/O warning : failed to load external entity "[configs_path]PCM/systemConfigBlueprint.xml"

OpenPASS experts know that this file ist not necessary in the PCM case, but for for beginners the warning may be confusing. It is always better to only have the strictly necessary in the configs directory to better understand the input files and their interdependencies, and the warning suggests an issue which does not exist.