schema/defs.json: Pull annotations over from config-schema.json

So we can use it in the coming state-schema.json without duplication.
I dropped the "id" because none of the other defs.json entries had an
ID.

Signed-off-by: W. Trevor King <wking@tremily.us>

schema/config-schema.json

@@ -24,15 +24,7 @@
             }
         },
         "annotations": {
-            "id": "https://opencontainers.org/schema/bundle/annotations",
-            "oneOf": [
-                {
-                    "$ref": "defs.json#/definitions/mapStringString"
-                },
-                {
-                    "type": "null"
-                }
-            ]
+            "$ref": "defs.json#/definitions/annotations"
         },
         "hostname": {
             "id": "https://opencontainers.org/schema/bundle/hostname",

schema/defs.json

@@ -159,6 +159,16 @@
         "ociVersion": {
             "description": "The version of Open Container Runtime Specification that the document complies with",
             "type": "string"
+        },
+        "annotations": {
+            "oneOf": [
+                {
+                    "$ref": "#/definitions/mapStringString"
+                },
+                {
+                    "type": "null"
+                }
+            ]
         }
     }
 }