msm: vidc: Remove unreferenced struct

struct sys_err_handler_data was left over after some code was deleted as
part of 845e9210.  Since it's useless
now, just delete it.

Change-Id: I51335f8421705814cbbd82360ceb49bae16286ec
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>