删除指定 Collection

var (
    ctx                 = context.Background()
    database            = "go-sdk-test-db"
    collectionName      = "go-sdk-test-coll"
)

db := client.Database(database)
result, _ := db.DropCollection(ctx, collectionName)
log.Printf("drop collection result: %+v", result)

drop collection result: &{AffectedCount:1}