message: Make the deletion of `process.versions.electron` simple.
diff: // We have to remove `process.versions.electron` to work around a bug of PDF.js.
  // With `process.versions.electron`, PDF.js misinterprets the context of the runtime as
  // the renderer of the browser.
  -const vers = process.versions
  -delete (vers as any).electron
  -// eslint-disable-next-line
  -delete process.versions as any
  -(process as any).versions = vers
  +delete (process.versions as any).electron
  import * as domstubs from '@tamuratak/domstubs'
  import * as fs from 'fs'
  