modify networktopologyaware Explanation

pkg/scheduler/plugins/networktopologyaware/networktopologyaware.go

@@ -67,7 +67,6 @@ func (bp *networkTopologyAwarePlugin) OnSessionClose(ssn *framework.Session) {
 // Explanation:
 // The RootHypernode property of a job is the hypernode that serves as the smallest root in the hypernode tree.
 // A job has multiple tasks, each belonging to a hypernode. This RootHypernode is the topmost and lowest common ancestor among the hypernodes of all tasks within the job.
-// The key of the rootHypernodes is the name of the hyperNode, and the value is the rootHyperNode calculated by using the hyperNode based on the distribution of the tasks that the job has already run.
 
 // Goals:
 // - The tier to which the rootHypernode of a job belongs should be as low as possible.