Function maybe_remove_invalid_entries 

fn maybe_remove_invalid_entries(
    args: &CheckIntegrityArgs,
    affected_keystores: &[InvalidKeystoreEntries<'_>],
    keymgr: &KeyMgr,
) -> Result<()>

Helper function for run_check_integrity.

Removes invalid keystore entries. Prints an error message if one or more entries fail to be removed. Returns Err if an I/O error occurs.