nodepool: remove the default k1s pods

Change-Id: I9c6e7b80e1c1304dac773c97f73cebaf8c8d2d09
diff --git a/nodepool/_pods.yaml b/nodepool/_pods.yaml
deleted file mode 100644
index 491a749..0000000
--- a/nodepool/_pods.yaml
+++ /dev/null
@@ -1,5 +0,0 @@
-# This file is managed by sfconfig, do not edit manually
----
-labels:
-  - name: pod-centos-7
-