Remove mention of K8s 1.8

Author: owainlewis

README.md

@@ -221,8 +221,6 @@ characters and cannot contain '.'s. To reconstruct the OCID we use the region
 of the master on which `Detach()` is exected so this blocks support for cross
 region clusters.
 
-This issue is not set to be resolved until the release of Kubernetes 1.8.
-
 ## Support
 
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