Extra Build: Remove parameters for FreeRTOS

FreeRTOS kernel should be downloaded by CMake during the build stage.
Because there are only 3 build configs in tf-m-extra job need this repo.
And version of FreeRTOS kernal may differ from platforms.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ia45aff223c80574fe05e7d79050d3b9f374aa74a
1 file changed