test: cleanup newly added test for navigation referer (#3179)
test: cleanup newly added test for navigation referer (#3179)

Make sure that referer that is passed as `page.goto` option doesn't
override subrequest referers.
puppeteer/puppeteer,GoogleChrome/puppeteer,puppeteer/puppeteer,GoogleChrome/puppeteer,GoogleChrome/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer