Currently there is no way to unlink files under CBOM or Drawings. For MEs this is no issue as files get pushed here via the MCAD tool. For EEs, once a ECAD package is imported (via WebUI) there is no way to 1) rename files in case of accidental filename typo and 2) simply unlink files from a part.
My team would like to use the Drawings tab to store PDF files such as schematics, PCB assembly drawings etc, The issue is these files persist even after making a new version. It would be very handy if we could simply unlink any file within the WebUI once a part is put back into development state.