openapi: remove postprocessing for old paths, deprecated in 1.9

Author: sttts

cmd/kube-apiserver/app/BUILD

@@ -76,7 +76,6 @@ go_library(
         "//vendor/github.com/go-openapi/spec:go_default_library",
         "//vendor/github.com/spf13/cobra:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
-        "//vendor/k8s.io/kube-openapi/pkg/common:go_default_library",
     ],
 )