linux-raspberrypi: remove custom oldconfig command

This command is done (with more correct flags) in kernel.bbclass's
kernel_do_configure. Since we inherit that and prepend to it, we don't
need to run it ourselves, as we end up just running it twice.

Signed-off-by: Martin Kelly <mkelly@xevo.com>

recipes-kernel/linux/linux-raspberrypi.inc

@@ -152,8 +152,6 @@ do_configure_prepend() {
     # Remove all modified configs and add the rest to .config
     sed -e "${CONF_SED_SCRIPT}" < '${B}/.config.patched' >> '${B}/.config'
     rm -f ${B}/.config.patched
-
-    yes '' | oe_runmake oldconfig
 }
 
 do_compile_append_raspberrypi3-64() {