kernel: modules: slhc: remove CRC_CCITT depends

slhc does not depends on CRC_CCITT according to kernel Kconfig.

Signed-off-by: Qingfang Deng <dqfext@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/23464
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>

package/kernel/linux/modules/netsupport.mk

@@ -557,7 +557,6 @@ define KernelPackage/slhc
   SUBMENU:=$(NETWORK_SUPPORT_MENU)
   HIDDEN:=1
   TITLE:=Serial Line Header Compression
-  DEPENDS:=+kmod-lib-crc-ccitt
   KCONFIG:=CONFIG_SLHC
   FILES:=$(LINUX_DIR)/drivers/net/slip/slhc.ko
 endef