schema/schema.json: Make 'hostname' optional

wking · Ma Shimiao · commit cbd383e96642 · 2016-08-18T17:52:01.000+08:00
The JSON Schema requirement dates back to cdcabde (schema: JSON Schema and validator for `config.json`, 2016-01-19, opencontainers#313), but the property has been explicitly optional in the Markdown spec since 7ac41c6 (config.md: reformat into a standard style, 2015-06-30). Signed-off-by: W. Trevor King <wking@tremily.us>
diff --git a/schema/schema.json b/schema/schema.json
@@ -177,7 +177,6 @@
         "platform",
         "process",
         "root",
-        "hostname",
         "mounts",
         "hooks"
     ]

Original file line number	Diff line number	Diff line change
`@@ -177,7 +177,6 @@`
`177`	`177`	`"platform",`
`178`	`178`	`"process",`
`179`	`179`	`"root",`
`180`		`- "hostname",`
`181`	`180`	`"mounts",`
`182`	`181`	`"hooks"`
`183`	`182`	`]`