runc: remove unneeded MENU:=1

Now that runc builds according to available kernel features and there
is no longer a sub-menu to select them manually, also drop the MENU:=1
statement from the package Makefile.

Fixes: 3a06ce559 ("runc: Updated to v1.0.0-rc92 for dockerd")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>

utils/runc/Makefile

@@ -29,7 +29,6 @@ define Package/runc
   TITLE:=runc container runtime
   URL:=https://www.opencontainers.org/
   DEPENDS:=$(GO_ARCH_DEPENDS) @(aarch64||arm||x86_64) +KERNEL_SECCOMP_FILTER:libseccomp
-  MENU:=1
 endef
 
 define Package/runc/description