Bug 42831: Remove the shopping components.

browser/base/content/browser-init.js

browser/base/content/browser.js

browser/base/content/browser.js.globals

browser/base/content/browser.xhtml

browser/base/content/navigator-toolbox.inc.xhtml

browser/components/BrowserGlue.sys.mjs

browser/components/about/AboutRedirector.cpp

browser/components/about/components.conf

browser/components/shopping/jar.mn

browser/components/shopping/moz.build

toolkit/components/shopping/jar.mn

toolkit/modules/RemotePageAccessManager.sys.mjs