The memory of AUSF ausfContext keeps growing as more users connect

[mabo-zt]

I noticed something suspicious in the AUSF implementation, but I'm not sure if it's actually a bug

a)　global variable

var ausfContext AUSFContext  // global variable

b)　There are add functions, but no delete functions.

// Add
func AddAusfUeContextToPool(ausfUeContext *AusfUeContext) {
    ausfContext.UePool.Store(ausfUeContext.Supi, ausfUeContext)
}

func AddSuciSupiPairToMap(supiOrSuci string, supi string) {
    ausfContext.suciSupiMap.Store(supiOrSuci, newPair)
}

// there is no delete functions, such as:
// func DeleteAusfUeContextFromPool(supi string) { ... }
// func DeleteSuciSupiPairFromMap(supiOrSuci string) { ... }

With a massive number of users, this would lead to unbounded memory growth.
Is this a case of human resource constraints, or is there actually no need for this method?