configs/rock5b: remove futile unsetting of BR2_LINUX_KERNEL_INTREE_DTS_NAME

The rock5b_defconfig contained a

  # BR2_LINUX_KERNEL_INTREE_DTS_NAME is not set

line. This caused check-dotconfig.py to throw a warning in the
buildroot CI, because the explicit unsetting of the parameter is not
taken on in the actual dotconfig, but instead the dotconfig will
contain the line 'BR2_LINUX_KERNEL_INTREE_DTS_NAME=""'.

This patch removes the parameter from the rock5b_defconfig. The
resulting dotconfig from the original rock5b_defconfig and the
rock5b_defconfig without the parameter is identical, but the
check-dotconfig.py does not throw a warning anymore.

Signed-off-by: Kilian Zinnecker <kilian.zinnecker@mail.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/rock5b_defconfig

@@ -14,7 +14,6 @@ BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/radxa/kernel.git"
 BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="52f51a2b5ba178f331af62260d2da86d7472c14b"
 BR2_LINUX_KERNEL_DEFCONFIG="rockchip_linux"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-# BR2_LINUX_KERNEL_INTREE_DTS_NAME is not set
 BR2_LINUX_KERNEL_CUSTOM_DTS_PATH="board/radxa/rock5b/rock5b.dts"
 BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT=y
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/radxa/rock5b/linux.fragment"