fix: remove action and channel from operation trait object (#317)

Author: magicmatatjahu

definitions/3.0.0/operationTrait.json

@@ -7,12 +7,6 @@
     }
   },
   "properties": {
-    "action": {
-      "$ref": "http://asyncapi.com/definitions/3.0.0/operation.json#/properties/action"
-    },
-    "channel": {
-      "$ref": "http://asyncapi.com/definitions/3.0.0/operation.json#/properties/channel"
-    },
     "title": {
       "$ref": "http://asyncapi.com/definitions/3.0.0/operation.json#/properties/title"
     },