Doc: Delete pyc in a structure of dashboard.rst file
Doc: Delete pyc in a structure of dashboard.rst file

dashboard.pyc and __init__.pyc are redundant, it is
not useful and should be removed.

Change-Id: Iacb904596413232a22c72832f69dc20eca69b6f6

noironetworks/horizon,noironetworks/horizon,openstack/horizon,NeCTAR-RC/horizon,ChameleonCloud/horizon,NeCTAR-RC/horizon,ChameleonCloud/horizon,openstack/horizon,ChameleonCloud/horizon,openstack/horizon,noironetworks/horizon,NeCTAR-RC/horizon,openstack/horizon,NeCTAR-RC/horizon,ChameleonCloud/horizon,noironetworks/horizon