Edit JSON

I have a JSON from Infotable, but I have a lot of information i don't need. I just want "rows". I do not want "datashape". What is the code to take only "rows" or delete the "datashape"?

json=

{
"rows":[
      {"Desc":"b",
       "Class":"d",      
     }],

"dataShape":{
      "fieldDefinitions":{
                       "Desc":{
                              "name":"Desc",
                             "aspects":{"isPrimaryKey":false},
                            "description":"",
                            "baseType":"STRING",
                            "ordinal":2},
                       "Class":{
                             "name":"Class",
                             "aspects":{"isPrimaryKey":false},
                            "description":"",
                            "baseType":"STRING",
                            "ordinal":3},

                        }}
}