configs/qemu_arm_vexpress_tz_defconfig: don't embed optee-benchmark

Package optee-benchmark is no more maintained by OP-TEE community
hence don't enable that package in qemu_arm_vexpress_tz_defconfig.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

configs/qemu_arm_vexpress_tz_defconfig

@@ -40,7 +40,6 @@ BR2_TARGET_ARM_TRUSTED_FIRMWARE_ADDITIONAL_VARIABLES="BL32_RAM_LOCATION=tdram"
 BR2_TARGET_OPTEE_OS=y
 BR2_TARGET_OPTEE_OS_NEEDS_DTC=y
 BR2_TARGET_OPTEE_OS_PLATFORM="vexpress-qemu_virt"
-BR2_PACKAGE_OPTEE_BENCHMARK=y
 BR2_PACKAGE_OPTEE_EXAMPLES=y
 BR2_PACKAGE_OPTEE_TEST=y