Remove ARDUINO form factor from RBLAB_BLENANO2
Remove ARDUINO form factor from RBLAB_BLENANO2

Remove the ARDUINO form factor from the RBLAB_BLENANO2 since it
does not have D11, D12, D14, D15 defined and does not physically have
the arduino form factor.

andcor02/mbed-os,mbedmicro/mbed,mbedmicro/mbed,andcor02/mbed-os,andcor02/mbed-os,kjbracey-arm/mbed,mbedmicro/mbed,andcor02/mbed-os,kjbracey-arm/mbed,kjbracey-arm/mbed,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed,mbedmicro/mbed,kjbracey-arm/mbed