package/iputils: drop wrong linux-headers dependency

Commit 9ffcd9279e5505535a73cf1200b3a86fd425cf32 wrongly added a
linux-headers dependency when switching to meson.

Remove it as headers are always provided by the toolchain.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Acked-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/iputils/iputils.mk

@@ -40,13 +40,8 @@ IPUTILS_DEPENDENCIES += libgcrypt
 else ifeq ($(BR2_PACKAGE_OPENSSL),y)
 IPUTILS_CONF_OPTS += -DUSE_CRYPTO=openssl
 IPUTILS_DEPENDENCIES += openssl
-else ifeq ($(BR2_PACKAGE_LINUX_HEADERS),y)
-IPUTILS_CONF_OPTS += -DUSE_CRYPTO=kernel
-IPUTILS_DEPENDENCIES += linux-headers
 else
-IPUTILS_CONF_OPTS += -DUSE_CRYPTO=none
-# BUILD_NINFOD=true and USE_CRYPTO=none cannot be combined
-IPUTILS_NINFOD = n
+IPUTILS_CONF_OPTS += -DUSE_CRYPTO=kernel
 endif
 
 ifeq ($(BR2_PACKAGE_SYSTEMD),y)