Remove vesta-500 reference

conf/machine/vesta-500.conf

-#@TYPE: Machine
-#@NAME: Rigado i.MX6ULL Vesta 
-#@SOC: i.MX6ULL
-#@DESCRIPTION: Machine configuration for Rigado Vesta 500
-#@MAINTAINER: David Mondou<David.Mondou@rigado.com>
-
-MACHINEOVERRIDES =. "mx6:mx6ull:"
-
-include conf/machine/include/imx-base.inc
-include conf/machine/include/tune-cortexa7.inc
-include conf/machine/include/meta-java.inc
-
-MACHINE_FEATURES += " pci wifi bluetooth"
-MACHINE_STORAGE_DEVICE = "emmc"
-
-SOC_FAMILY = "mx6ull"
-
-KERNEL_DEVICETREE = "vesta-500.dtb"
-KERNEL_DEVICETREE += "310-00110-0003.dtb 310-00121-0001.dtb"
-PREFERRED_PROVIDER_kernel-module-qcacld = "kernel-module-qcacld_2.3.3"
-PREFERRED_PROVIDER_virtual/bootloader ?= "u-boot-vesta"
-PREFERRED_PROVIDER_virtual/kernel ?= "linux-fslc-imx"
-PREFERRED_VERSION_bluez5 = "5.47"
-
-UBOOT_MAKE_TARGET = ""
-UBOOT_MACHINE = "vesta_500_config"
-SERIAL_CONSOLES ?= "115200;ttymxc1"
-
-IMAGE_INSTALL_append += "qca9377-scripts"