Revert "Add a new app API to enable watchdog behavior restarts in kiosk apps"

extensions/common/api/runtime.json

Index: extensions/common/api/runtime.json
diff --git a/extensions/common/api/runtime.json b/extensions/common/api/runtime.json
index 0c28293971f44609e516d657973a977061b45002..c36c6c74879cf842697679a63fe10fed255c36a1 100644
--- a/extensions/common/api/runtime.json
+++ b/extensions/common/api/runtime.json
@@ -264,24 +264,6 @@
         "parameters": []
       },
       {
-        "name": "restartAfterDelay",
-        "description": "Restart the ChromeOS device when the app runs in kiosk mode after the given seconds. If called again before the time ends, the reboot will be delayed. If called with a value of -1, the reboot will be cancelled. It's a no-op in non-kiosk mode. It's only allowed to be called repeatedly by the first extension to invoke this API.",
-        "type": "function",
-        "parameters": [
-          {
-            "type": "integer",
-            "name": "seconds",
-            "description": "Time to wait in seconds before rebooting the device, or -1 to cancel a scheduled reboot."
-          },
-          {
-            "type": "function",
-            "name": "callback",
-            "description": "A callback to be invoked when a restart request was successfully rescheduled.",
-            "optional": true
-          }
-        ]
-      },
-      {
         "name": "connect",
         "type": "function",
         "nocompile": true,