Remove testlabel

This label is no longer needed.  Also, remove the volume-type
entry from the remaining label, it is not necessary (and was
incorrect; the name is actually pd-standard).  A future nodepool
change will begin using this value, so we should clean it up now.

Change-Id: I938970482588450b3b5802e20898d6a8063eaaa9
diff --git a/nodepool/nodepool.yaml b/nodepool/nodepool.yaml
index a164dcb..ce5278e 100644
--- a/nodepool/nodepool.yaml
+++ b/nodepool/nodepool.yaml
@@ -19,18 +19,10 @@
         max-servers: 8
         use-internal-ip: True
         labels:
-          - name: testlabel
-            instance-type: f1-micro
-            cloud-image: debian-stretch
-            volume-type: standard
-            volume-size: 10
           - name: debian-stretch-8G
             instance-type: n1-standard-2
             cloud-image: debian-stretch
-            volume-type: standard
             volume-size: 40
 labels:
-  - name: testlabel
-    min-ready: 1
   - name: debian-stretch-8G
     min-ready: 1