jool: Remove ethtool dependency

Unneeded since jool 4.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/jool/Makefile

@@ -9,7 +9,7 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=jool
 PKG_VERSION:=4.0.6
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/NICMx/Jool/releases/download/v$(PKG_VERSION)
@@ -88,7 +88,7 @@ endef
 define Package/jool-tools
   $(call Package/jool/Default)
   TITLE:=Jool userspace control programs
-  DEPENDS:=+libnl +libxtables +ethtool
+  DEPENDS:=+libnl +libxtables
 endef
 
 define Package/jool-tools/description