[project @ extensions.ax.FetchResponse.fromSuccessResponse: return new instance, not None.] also remove code duplicated from SuccessResponse.extensionResponse.
[project @ extensions.ax.FetchResponse.fromSuccessResponse: return new instance, not None.]
also remove code duplicated from SuccessResponse.extensionResponse.

misli/python3-openid,graingert/python-openid,necaris/python3-openid,necaris/python3-openid,udacity/python-openid,coxmediagroup/python-openid,jcowley/python-openid,openid/python-openid,misli/python3-openid,graingert/python-openid,moreati/python3-openid,adieu/python-openid,graingert/python-openid,graingert/python-openid,coxmediagroup/python-openid,openid/python-openid,udacity/python-openid,lillialexis/python-openid,moreati/python3-openid,coxmediagroup/python-openid,misli/python3-openid,isagalaev/sm-openid,moreati/python3-openid