Core: Remove unused SVC number 'TFM_SVC_SCHEDULE'

tfm_thrd_activate_schedule() is only used in core, so won't trigger
SVC number 'TFM_SVC_SCHEDULE'.

Change-Id: I86a8fba34456058dc227df5b3c3dd7728dfc835a
Signed-off-by: Summer Qin <summer.qin@arm.com>
2 files changed