toasterui: remove ParseStarted from the event list

toasterui: remove ParseStarted from the event list

bb.event.ParseStarted event is not processed by toasterui, but
present in event list. This causes the following error:
   WARNING: Unknown event: <bb.event.ParseStarted object at ...
and non-zero return code:
   WARNING: Return value is 1

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>