Removing "storageProfile": "StorageAccount" for managed disk (#824)

Having two "storageProfile": tag in JSON  is going to simply overwrite previous value and we dont need it "storageProfile": "StorageAccount", for managed disks.

Author: uday31in

examples/windows/kubernetes-manageddisks.json

@@ -17,7 +17,6 @@
         "vmSize": "Standard_D2_v2",
         "storageProfile" : "ManagedDisks",
         "availabilityProfile": "AvailabilitySet",
-        "storageProfile": "StorageAccount",
         "OSDiskSizeGB": 200,
         "diskSizesGB": [128, 128, 128, 128],
         "osType": "Windows"