Revert support for render prop in <Main />

[devknoll]

Reverts support for render prop in <Main /> in Document. This was added just to support the useFlushEffect hook, but we've tweaked the design a bit, moving it to App.

[ijjk]

Stats from current PR

Default Build (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
buildDuration	23.2s	23.2s	⚠️ +57ms
buildDurationCached	4.4s	4.2s	-193ms
nodeModulesSize	347 MB	347 MB	-1.98 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.927	3.82	-0.11
/ avg req/sec	636.63	654.49	+17.86
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.09	2.099	⚠️ +0.01
/error-in-render avg req/sec	1196.26	1191.09	⚠️ -5.17

Client Bundles (main, webpack, commons)

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.2 kB	42.2 kB	✓
main-HASH.js gzip	28.4 kB	28.4 kB	✓
webpack-HASH.js gzip	1.45 kB	1.45 kB	✓
Overall change	72.3 kB	72.3 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
_app-HASH.js gzip	1.37 kB	1.37 kB	✓
_error-HASH.js gzip	194 B	194 B	✓
amp-HASH.js gzip	312 B	312 B	✓
css-HASH.js gzip	326 B	326 B	✓
dynamic-HASH.js gzip	2.38 kB	2.38 kB	✓
head-HASH.js gzip	350 B	350 B	✓
hooks-HASH.js gzip	635 B	635 B	✓
image-HASH.js gzip	4.49 kB	4.49 kB	✓
index-HASH.js gzip	263 B	263 B	✓
link-HASH.js gzip	1.87 kB	1.87 kB	✓
routerDirect..HASH.js gzip	321 B	321 B	✓
script-HASH.js gzip	383 B	383 B	✓
withRouter-HASH.js gzip	318 B	318 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	13.3 kB	13.3 kB	✓

Client Build Manifests

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
_buildManifest.js gzip	460 B	460 B	✓
Overall change	460 B	460 B	✓

Rendered Page Sizes

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
index.html gzip	531 B	531 B	✓
link.html gzip	544 B	544 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

---

Default Build with SWC (Increase detected ⚠️)

General Overall decrease ✓

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
buildDuration	25.6s	26s	⚠️ +321ms
buildDurationCached	4.1s	4.2s	⚠️ +47ms
nodeModulesSize	347 MB	347 MB	-1.98 kB

Page Load Tests Overall increase ✓

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
/ failed reqs	0	0	✓
/ total time (seconds)	3.909	3.836	-0.07
/ avg req/sec	639.55	651.69	+12.14
/error-in-render failed reqs	0	0	✓
/error-in-render total time (seconds)	2.125	2.113	-0.01
/error-in-render avg req/sec	1176.5	1183.04	+6.54

Client Bundles (main, webpack, commons)

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
450.HASH.js gzip	179 B	179 B	✓
framework-HASH.js gzip	42.3 kB	42.3 kB	✓
main-HASH.js gzip	28.6 kB	28.6 kB	✓
webpack-HASH.js gzip	1.44 kB	1.44 kB	✓
Overall change	72.5 kB	72.5 kB	✓

Legacy Client Bundles (polyfills)

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
polyfills-HASH.js gzip	31 kB	31 kB	✓
Overall change	31 kB	31 kB	✓

Client Pages

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
_app-HASH.js gzip	1.35 kB	1.35 kB	✓
_error-HASH.js gzip	180 B	180 B	✓
amp-HASH.js gzip	305 B	305 B	✓
css-HASH.js gzip	321 B	321 B	✓
dynamic-HASH.js gzip	2.37 kB	2.37 kB	✓
head-HASH.js gzip	342 B	342 B	✓
hooks-HASH.js gzip	622 B	622 B	✓
image-HASH.js gzip	4.53 kB	4.53 kB	✓
index-HASH.js gzip	256 B	256 B	✓
link-HASH.js gzip	1.9 kB	1.9 kB	✓
routerDirect..HASH.js gzip	314 B	314 B	✓
script-HASH.js gzip	375 B	375 B	✓
withRouter-HASH.js gzip	309 B	309 B	✓
85e02e95b279..7e3.css gzip	107 B	107 B	✓
Overall change	13.3 kB	13.3 kB	✓

Client Build Manifests

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
_buildManifest.js gzip	458 B	458 B	✓
Overall change	458 B	458 B	✓

Rendered Page Sizes

	vercel/next.js canary	azukaru/next.js x-revert-main-render-prop	Change
index.html gzip	530 B	530 B	✓
link.html gzip	545 B	545 B	✓
withRouter.html gzip	526 B	526 B	✓
Overall change	1.6 kB	1.6 kB	✓

Commit: 55e5998