Removes some exta members defined in __init__
Removes some exta members defined in __init__

nikolas/ims_lti_py,brainheart/dce_lti_py,tophatmonocle/ims_lti_py,mitodl/ims_lti_py,UbiCastTeam/ims_lti_py,bsulcer/ims_lti_py,harvard-dce/dce_lti_py