Don't log a bogus warning when kickstart specifies a disk label

When this code was introduced back in c0c04cc , it used blivet
1.0 platform.setDefaultDiskLabelType, which checked whether the
requested label was in the platform's supported labels, and
returned False immediately if it wasn't.

However, in mid-2017, blivet 2.0 made a big API change, and the
equivalent method - `DiskLabel.set_default_label_type` - does
not check the requested label in any way, and never returns
anything. It just assumes whatever you passed is OK, sets it,
and (implicitly) returns None.

anaconda was updated to use the new method, but the "log a
warning if it doesn't return" logic was left in place. So now we
always log this warning. We do actually always set the label
type, but the message is confusing.

Signed-off-by: Adam Williamson <[email protected]>

pyanaconda/modules/storage/partitioning/automatic/noninteractive_partitioning.py

@@ -62,10 +62,8 @@ def _get_initialization_config(self):
         # Update the disk label.
         disk_label = disk_init_proxy.DefaultDiskLabel
 
-        if disk_label and not DiskLabel.set_default_label_type(disk_label):
-            log.warning("%s is not a supported disklabel type on this platform. "
-                        "Using default disklabel %s instead.", disk_label,
-                        DiskLabel.get_platform_label_types()[0])
+        if disk_label:
+            DiskLabel.set_default_label_type(disk_label)
 
         return config