tests: Drop BDS from test-throttle.c

Now that throttling has been moved to the BlockBackend level, we do not
need to create a BDS along with the BB in the I/O throttling test.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/test-throttle.c

@@ -578,9 +578,9 @@ static void test_groups(void)
     BlockBackend *blk1, *blk2, *blk3;
     BlockBackendPublic *blkp1, *blkp2, *blkp3;
 
-    blk1 = blk_new_with_bs(&error_abort);
-    blk2 = blk_new_with_bs(&error_abort);
-    blk3 = blk_new_with_bs(&error_abort);
+    blk1 = blk_new(&error_abort);
+    blk2 = blk_new(&error_abort);
+    blk3 = blk_new(&error_abort);
 
     blkp1 = blk_get_public(blk1);
     blkp2 = blk_get_public(blk2);