omap3-touchbook: remove machine definition, since it's unsupported

There is no support for this device from meta-ti. Plus I don't have the device.
If there's anyone willing to maintain it, please let me know or feel free to
take it to a separate layer.

Signed-off-by: Denys Dmytriyenko <denys@ti.com>

conf/machine/omap3-touchbook.conf

@@ -1,46 +0,0 @@
-#@TYPE: Machine
-#@NAME: Always Innovating touchbook
-#@DESCRIPTION: Machine configuration for the http://www.alwaysinnovating.com/touchbook/
-
-PREFERRED_PROVIDER_virtual/xserver = "xserver-xorg"
-XSERVER = "xserver-xorg \
-           xf86-input-evdev \
-           xf86-input-mouse \
-           xf86-input-tslib \
-           xf86-video-fbdev \
-           xf86-video-omapfb \
-           xf86-input-keyboard"
-
-# Only has DVI connector for external screen
-GUI_MACHINE_CLASS = "bigscreen"
-
-require conf/machine/include/omap3.inc
-
-PREFERRED_PROVIDER_virtual/kernel = "linux-omap-psp"
-
-IMAGE_FSTYPES += "tar.bz2"
-EXTRA_IMAGECMD_jffs2 = "-lnp "
-
-# Guesswork
-SERIAL_CONSOLE = "115200 ttyS2"
-
-UBOOT_MACHINE = "omap3_beagle_config"
-XLOAD_MACHINE = "beagleboard_config"
-
-# do ubiattach /dev/ubi_ctrl -m 4
-# From dmesg:
-# UBI: smallest flash I/O unit:    2048
-# UBI: logical eraseblock size:    129024 bytes
-# from ubiattach stdout:
-# UBI device number 0, total 1996 LEBs
-MKUBIFS_ARGS = "-m 2048 -e 129024 -c 1996"
-
-# do ubiattach /dev/ubi_ctrl -m 4
-# from dmesg:
-# UBI: smallest flash I/O unit:    2048
-# UBI: physical eraseblock size:   131072 bytes (128 KiB)
-# UBI: sub-page size:              512
-UBINIZE_ARGS = "-m 2048 -p 128KiB -s 512"
-
-# and sdio
-MACHINE_FEATURES = "kernel26 screen apm usbgadget usbhost vfat alsa touchscreen sgx"