[{_id:ObjectId("62c2e94e65f32725f8f62b79"),Inventory:[{_id:"Apple",count:2},{_id:"Banna",count:0},{_id:"Orange",count:1},{_id:"Cherry",count:0},]}]

db.collection.update({_id:ObjectId("62c2e94e65f32725f8f62b79")},[{$set:{Inventory:{$filter:{input:"$Inventory",cond:{$ne:["$$this.count",0]}}}}}])