[M2351] Remove M2351KIAAEES from iar_definitions.json
[M2351] Remove M2351KIAAEES from iar_definitions.json

M2351 doesn't support IAR yet.

kjbracey-arm/mbed,andcor02/mbed-os,andcor02/mbed-os,andcor02/mbed-os,betzw/mbed-os,mbedmicro/mbed,andcor02/mbed-os,kjbracey-arm/mbed,c1728p9/mbed-os,betzw/mbed-os,mbedmicro/mbed,betzw/mbed-os,betzw/mbed-os,c1728p9/mbed-os,mbedmicro/mbed,c1728p9/mbed-os,c1728p9/mbed-os,mbedmicro/mbed,kjbracey-arm/mbed,kjbracey-arm/mbed,c1728p9/mbed-os,betzw/mbed-os,mbedmicro/mbed,andcor02/mbed-os,betzw/mbed-os,c1728p9/mbed-os,andcor02/mbed-os