Simple Mbed Cloud client application using features of K64 & K66 including Ethernet and SD Card

Fork of mbed-cloud-example_K64_K66 by Mac Lobdell

Remove sd-driver. It's in mbed-os now

the sd-driver needs to be removed to avoid conflict with the driver that is in mbed-os now.

Simple Mbed Cloud Client application using features of K64 & K66