Build release - RZ_A1H iar removal

There are issues with cmsis API, which were not ported to IAR.

Author: 0xc0170

workspace_tools/build_release.py

@@ -128,7 +128,7 @@
     ('ARM_MPS2_M7'   ,     ('ARM',)),
     ('ARM_MPS2_BEID' ,     ('ARM',)),
 
-    ('RZ_A1H'   ,     ('ARM', 'GCC_ARM', 'IAR')),
+    ('RZ_A1H'   ,     ('ARM', 'GCC_ARM')),
 
     ('EFM32ZG_STK3200',     ('GCC_ARM', 'uARM')),
     ('EFM32HG_STK3400',     ('GCC_ARM', 'uARM')),