[SERVER] "mapped" and "mappedWithJournal" still listed in serverStatus mem section summary

Description

Very minor issue - the "mapped" and "mappedWithJournal" items still appear in the mem section summary in server v4.2+ docs, even though they were deprecated with MMAPv1.

"mem" : {

   "bits" : <int>,

   "resident" : <int>,

   "virtual" : <int>,

   "supported" : <boolean>,

   "mapped" : <int>,

   "mappedWithJournal" : <int>

},

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)