configs/raspberrypi: remove packages not strictly required

rpi-userland and libcoffi are not strictly required to boot up the
Raspberry Pi, so remove them from the defconfig.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

configs/raspberrypi_defconfig

@@ -7,8 +7,6 @@ BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_TARGET_GENERIC_GETTY_PORT="tty1"
 
 BR2_PACKAGE_RPI_FIRMWARE=y
-BR2_PACKAGE_RPI_USERLAND=y
-BR2_PACKAGE_LIBCOFI=y
 
 # Lock to 3.10 headers as the RPi kernel is based off the 3.10 branch
 BR2_KERNEL_HEADERS_VERSION=y