package/freescale-imx/imx-vpu-hantro-daemon: remove _SOURCE variable

The value of the _SOURCE variable is the default value for this
variable, making its definition redundant.

Fixes:

package/freescale-imx/imx-vpu-hantro-daemon/imx-vpu-hantro-daemon.mk:9: remove default value of _SOURCE variable (http://nightly.buildroot.org/#generic-package-reference)

https://gitlab.com/buildroot.org/buildroot/-/jobs/3371766926

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/freescale-imx/imx-vpu-hantro-daemon/imx-vpu-hantro-daemon.mk

@@ -6,7 +6,6 @@
 
 IMX_VPU_HANTRO_DAEMON_VERSION = 1.1.4
 IMX_VPU_HANTRO_DAEMON_SITE = $(FREESCALE_IMX_SITE)
-IMX_VPU_HANTRO_DAEMON_SOURCE = imx-vpu-hantro-daemon-$(IMX_VPU_HANTRO_DAEMON_VERSION).tar.gz
 IMX_VPU_HANTRO_DAEMON_LICENSE = NXP Semiconductor Software License Agreement
 IMX_VPU_HANTRO_DAEMON_LICENSE_FILES = LICENSE.txt
 IMX_VPU_HANTRO_DAEMON_REDISTRIBUTE = NO