Remove branches from the GitHub repo

github-branches-removal.js

var preservedBranches = [
  'master', 'develop'
];

// Remove branches on the current page
var branches = document.getElementsByClassName('branch-summary');

for (var i = 0; i < branches.length; i++) {
  var branchName = branches[i].dataset.branchName;

  if ( ! preservedBranches.includes(branchName)) {
    branches[i].getElementsByClassName('branch-delete')[0].click();
  }
}