diff --git a/lib/utils/child-path.js b/lib/utils/child-path.js
deleted file mode 100644
index 38b9df1380267..0000000000000
--- a/lib/utils/child-path.js
+++ /dev/null
@@ -1,9 +0,0 @@
-var path = require('path')
-var validate = require('aproba')
-var moduleName = require('../utils/module-name.js')
-
-module.exports = childPath
-function childPath (parentPath, child) {
-  validate('SO', arguments)
-  return path.join(parentPath, 'node_modules', moduleName(child))
-}
diff --git a/lib/utils/completion/file-completion.js b/lib/utils/completion/file-completion.js
deleted file mode 100644
index b32eda52df93d..0000000000000
--- a/lib/utils/completion/file-completion.js
+++ /dev/null
@@ -1,23 +0,0 @@
-module.exports = fileCompletion
-
-const mkdir = require('mkdirp')
-const glob = require('glob')
-
-function fileCompletion (root, req, depth, cb) {
-  if (typeof cb !== 'function') {
-    cb = depth
-    depth = Infinity
-  }
-  mkdir(root).catch(cb).then(() => {
-    // can be either exactly the req, or a descendent
-    var pattern = root + '/{' + req + ',' + req + '/**/*}'
-    var opts = { mark: true, dot: true, maxDepth: depth }
-    glob(pattern, opts, function (er, files) {
-      if (er)
-        return cb(er)
-      return cb(null, (files || []).map(function (f) {
-        return f.substr(root.length + 1).replace(/^\/|\/$/g, '')
-      }))
-    })
-  })
-}
diff --git a/lib/utils/deep-sort-object.js b/lib/utils/deep-sort-object.js
deleted file mode 100644
index 56f1854f1e2f6..0000000000000
--- a/lib/utils/deep-sort-object.js
+++ /dev/null
@@ -1,14 +0,0 @@
-var sortedObject = require('sorted-object')
-
-module.exports = function deepSortObject (obj) {
-  if (obj == null || typeof obj !== 'object')
-    return obj
-  if (obj instanceof Array)
-    return obj.map(deepSortObject)
-
-  obj = sortedObject(obj)
-  Object.keys(obj).forEach(function (key) {
-    obj[key] = deepSortObject(obj[key])
-  })
-  return obj
-}
diff --git a/lib/utils/git.js b/lib/utils/git.js
deleted file mode 100644
index 299302b277eea..0000000000000
--- a/lib/utils/git.js
+++ /dev/null
@@ -1,55 +0,0 @@
-const exec = require('child_process').execFile
-const spawn = require('./spawn')
-const npm = require('../npm.js')
-const which = require('which')
-const git = npm.config.get('git')
-const log = require('npmlog')
-const noProgressTillDone = require('./no-progress-while-running.js').tillDone
-const { promisify } = require('util')
-
-exports.spawn = spawnGit
-exports.exec = promisify(execGit)
-exports.chainableExec = chainableExec
-exports.whichAndExec = whichAndExec
-
-function prefixGitArgs () {
-  return process.platform === 'win32' ? ['-c', 'core.longpaths=true'] : []
-}
-
-function execGit (args, options, cb) {
-  log.info('git', args)
-  const fullArgs = prefixGitArgs().concat(args || [])
-  return exec(git, fullArgs, options, noProgressTillDone(cb))
-}
-
-function spawnGit (args, options) {
-  log.info('git', args)
-  // If we're already in a git command (eg, running test as an exec
-  // line in an interactive rebase) then these environment variables
-  // will force git to operate on the current project, instead of
-  // checking out/fetching/etc. whatever the user actually intends.
-  options.env = options.env || Object.keys(process.env)
-    .filter(k => !/^GIT/.test(k))
-    .reduce((set, k) => {
-      set[k] = process.env[k]
-      return set
-    }, {})
-  return spawn(git, prefixGitArgs().concat(args || []), options)
-}
-
-function chainableExec () {
-  var args = Array.prototype.slice.call(arguments)
-  return [execGit].concat(args)
-}
-
-function whichAndExec (args, options, cb) {
-  // check for git
-  which(git, function (err) {
-    if (err) {
-      err.code = 'ENOGIT'
-      return cb(err)
-    }
-
-    execGit(args, options, cb)
-  })
-}
diff --git a/lib/utils/module-name.js b/lib/utils/module-name.js
deleted file mode 100644
index c58050e55e574..0000000000000
--- a/lib/utils/module-name.js
+++ /dev/null
@@ -1,38 +0,0 @@
-var path = require('path')
-
-module.exports = moduleName
-module.exports.test = {}
-
-module.exports.test.pathToPackageName = pathToPackageName
-function pathToPackageName (dir) {
-  if (dir == null)
-    return ''
-  if (dir === '')
-    return ''
-  var name = path.relative(path.resolve(dir, '..'), dir)
-  var scoped = path.relative(path.resolve(dir, '../..'), dir)
-  if (scoped[0] === '@')
-    return scoped.replace(/\\/g, '/')
-  return name.trim()
-}
-
-module.exports.test.isNotEmpty = isNotEmpty
-function isNotEmpty (str) {
-  return str != null && str !== ''
-}
-
-var unknown = 0
-function moduleName (tree) {
-  if (tree.name)
-    return tree.name
-  var pkg = tree.package || tree
-  if (isNotEmpty(pkg.name) && typeof pkg.name === 'string')
-    return pkg.name.trim()
-  var pkgName = pathToPackageName(tree.path)
-  if (pkgName !== '')
-    return pkgName
-  if (tree._invalidName != null)
-    return tree._invalidName
-  tree._invalidName = '!invalid#' + (++unknown)
-  return tree._invalidName
-}