ARM: mach-shmobile: Unset initramfs source in bonito defconfig.

There's no reason for this to be set, and it will simply introduce build
errors for others, so simply leave it unset.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/arm/configs/bonito_defconfig

@@ -8,7 +8,7 @@ CONFIG_LOG_BUF_SHIFT=16
 # CONFIG_USER_NS is not set
 # CONFIG_PID_NS is not set
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_INITRAMFS_SOURCE="/your/initramfs/"
+CONFIG_INITRAMFS_SOURCE=""
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_SLAB=y
 CONFIG_MODULES=y