JSFiddle - React, Tailwind, and code Playground

JavaScript

// Code goes here
'use strict';

let jsObj = {
  "cases":[
    { 
        "case_no":1,
        "case_input":[
        {
          "input":6,
          "input2":[1,2,3,4,10,11]
        }],
        "case_output":31
    },
    { 
      "case_no":2,
      "case_input":[
        {
          "input":5,
          "input2":[5,5,5,5,14,17]
        }],
      "case_output":51
    }
        ]       
}
let inputArr = [];
jsObj['cases'].forEach(function(caseInput) {
  caseInput.case_input.forEach(function(caseInput) {
    let obj = {};
    obj[caseInput.input] = caseInput.input2;
    inputArr.push(obj)
  })
});
console.log(inputArr);