[Examples] Remove with-polyfills

[lfades]

We should probably merge this with the next stable release that includes #10212

[ijjk]

Stats from current PR

Default Server Mode

General

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
buildDuration	10.6s	11.6s	⚠️ +959ms
nodeModulesSize	52.7 MB	52.7 MB	✓

Client Bundles (main, webpack, commons)

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
main-HASH.js gzip	5.14 kB	5.14 kB	✓
webpack-HASH.js gzip	746 B	746 B	✓
4952ddcd88e7..54d3.js gzip	4.68 kB	4.68 kB	✓
commons.HASH.js gzip	4.06 kB	4.06 kB	✓
de003c3a9d30..6894.js gzip	16.3 kB	16.3 kB	✓
framework.HASH.js gzip	39.1 kB	39.1 kB	✓
Overall change	70 kB	70 kB	✓

Client Bundles (main, webpack, commons) Modern

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
main-HASH.module.js gzip	4.14 kB	4.14 kB	✓
webpack-HASH..dule.js gzip	746 B	746 B	✓
4952ddcd88e7..dule.js gzip	5.56 kB	5.56 kB	✓
de003c3a9d30..dule.js gzip	15.1 kB	15.1 kB	✓
framework.HA..dule.js gzip	39.1 kB	39.1 kB	✓
Overall change	64.7 kB	64.7 kB	✓

Legacy Client Bundles (polyfills)

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
polyfills-HASH.js gzip	4.76 kB	4.76 kB	✓
Overall change	4.76 kB	4.76 kB	✓

Client Pages

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
_app.js gzip	1.15 kB	1.15 kB	✓
_error.js gzip	4.07 kB	4.07 kB	✓
hooks.js gzip	779 B	779 B	✓
index.js gzip	222 B	222 B	✓
link.js gzip	2.95 kB	2.95 kB	✓
routerDirect.js gzip	283 B	283 B	✓
withRouter.js gzip	282 B	282 B	✓
Overall change	9.73 kB	9.73 kB	✓

Client Pages Modern

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
_app.module.js gzip	576 B	576 B	✓
_error.module.js gzip	3.06 kB	3.06 kB	✓
hooks.module.js gzip	371 B	371 B	✓
index.module.js gzip	212 B	212 B	✓
link.module.js gzip	2.49 kB	2.49 kB	✓
routerDirect..dule.js gzip	273 B	273 B	✓
withRouter.m..dule.js gzip	272 B	272 B	✓
Overall change	7.25 kB	7.25 kB	✓

Client Build Manifests

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
_buildManifest.js gzip	61 B	61 B	✓
_buildManife..dule.js gzip	61 B	61 B	✓
Overall change	122 B	122 B	✓

Rendered Page Sizes

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
index.html gzip	1.03 kB	1.03 kB	✓
link.html gzip	1.04 kB	1.04 kB	✓
withRouter.html gzip	1.03 kB	1.03 kB	✓
Overall change	3.11 kB	3.11 kB	✓

---

Serverless Mode (Decrease detected ✓)

General

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
buildDuration	11.3s	10.7s	-631ms
nodeModulesSize	52.7 MB	52.7 MB	✓

Client Bundles (main, webpack, commons)

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
main-HASH.js gzip	5.14 kB	5.14 kB	✓
webpack-HASH.js gzip	746 B	746 B	✓
4952ddcd88e7..54d3.js gzip	4.68 kB	4.68 kB	✓
commons.HASH.js gzip	4.06 kB	4.06 kB	✓
de003c3a9d30..6894.js gzip	16.3 kB	16.3 kB	✓
framework.HASH.js gzip	39.1 kB	39.1 kB	✓
Overall change	70 kB	70 kB	✓

Client Bundles (main, webpack, commons) Modern

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
main-HASH.module.js gzip	4.14 kB	4.14 kB	✓
webpack-HASH..dule.js gzip	746 B	746 B	✓
4952ddcd88e7..dule.js gzip	5.56 kB	5.56 kB	✓
de003c3a9d30..dule.js gzip	15.1 kB	15.1 kB	✓
framework.HA..dule.js gzip	39.1 kB	39.1 kB	✓
Overall change	64.7 kB	64.7 kB	✓

Legacy Client Bundles (polyfills)

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
polyfills-HASH.js gzip	4.76 kB	4.76 kB	✓
Overall change	4.76 kB	4.76 kB	✓

Client Pages

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
_app.js gzip	1.15 kB	1.15 kB	✓
_error.js gzip	4.07 kB	4.07 kB	✓
hooks.js gzip	779 B	779 B	✓
index.js gzip	222 B	222 B	✓
link.js gzip	2.95 kB	2.95 kB	✓
routerDirect.js gzip	283 B	283 B	✓
withRouter.js gzip	282 B	282 B	✓
Overall change	9.73 kB	9.73 kB	✓

Client Pages Modern

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
_app.module.js gzip	576 B	576 B	✓
_error.module.js gzip	3.06 kB	3.06 kB	✓
hooks.module.js gzip	371 B	371 B	✓
index.module.js gzip	212 B	212 B	✓
link.module.js gzip	2.49 kB	2.49 kB	✓
routerDirect..dule.js gzip	273 B	273 B	✓
withRouter.m..dule.js gzip	272 B	272 B	✓
Overall change	7.25 kB	7.25 kB	✓

Client Build Manifests

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
_buildManifest.js gzip	61 B	61 B	✓
_buildManife..dule.js gzip	61 B	61 B	✓
Overall change	122 B	122 B	✓

Serverless bundles Overall decrease ✓

	zeit/next.js canary	lfades/next.js examples/deprecate-with-polyfills	Change
_error.js gzip	290 kB	290 kB	⚠️ +412 B
404.html gzip	1.45 kB	1.45 kB	✓
hooks.html gzip	1.08 kB	1.08 kB	✓
index.js gzip	290 kB	289 kB	-600 B
link.js gzip	319 kB	320 kB	⚠️ +424 B
routerDirect.js gzip	316 kB	316 kB	-631 B
withRouter.js gzip	316 kB	317 kB	⚠️ +155 B
Overall change	1.53 MB	1.53 MB	-240 B

Commit: b1ea147

[timneutkens]

Let's only do this once it lands and there's no cases for using it anymore.