Add ReadOnlyAPIDataVolumes in removed feature gates list

content/en/docs/reference/command-line-tools-reference/feature-gates/readonly-apidata-volumes.md

@@ -0,0 +1,27 @@
+---
+# Removed from Kubernetes
+title: ReadOnlyAPIDataVolumes
+content_type: feature_gate
+
+_build:
+  list: never
+  render: false
+
+stages:
+  - stage: beta 
+    defaultValue: true
+    fromVersion: "1.8"
+    toVersion: "1.9"
+  - stage: stable
+    fromVersion: "1.10"
+    toVersion: "1.10"
+
+removed: true  
+---
+Set [`configMap`](/docs/concepts/storage/volumes/#configmap), 
+[`secret`](/docs/concepts/storage/volumes/#secret), 
+[`downwardAPI`](/docs/concepts/storage/volumes/#downwardapi) and 
+[`projected`](/docs/concepts/storage/volumes/#projected) 
+{{< glossary_tooltip term_id="volume" text="volumes" >}} to be mounted read-only.
+
+Since Kubernetes v1.10, these volume types are always read-only and you cannot opt out.