configs: Remove am335x_boneblack_defconfig

The am335x_evm_defconfig supports all am335x_boneblack variants. Remove
the redundant am335x_boneblack_defconfig.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
1 file changed