[docs] Remove compose helper

[oliviertassinari]

Kill docs/src/modules/utils/compose.js, this has been a problem for people copy & pasting the onepirate premium theme (#14604). This is also one step closer to a full hook codebase.

export default function compose(...funcs) {
  return funcs.reduce((a, b) => (...args) => a(b(...args)), arg => arg);
}

I appreciate how it reduces the overall number of LOCs.

[eps1lon]

This PR is a smoke screen for another change.

[oliviertassinari]

This PR is a smoke screen for another change.

@eps1lon Do you mean #16380 (comment)? I have noticed the potential for improvement migrating the Ad component from the classes to hooks. It was simpler to bake the change here directly. I believe that we don't need more than one char i.

[mui-pr-bot]

Details of bundle changes.

Comparing: 7fe530f...f2b702f

bundle	parsed diff	gzip diff	prev parsed	current parsed	prev gzip	current gzip
@material-ui/core	0.00%	0.00%	320,029	320,029	88,270	88,270
@material-ui/core/Paper	0.00%	0.00%	68,291	68,291	20,369	20,369
@material-ui/core/Paper.esm	0.00%	0.00%	61,573	61,573	19,161	19,161
@material-ui/core/Popper	0.00%	0.00%	28,945	28,945	10,395	10,395
@material-ui/core/Textarea	0.00%	0.00%	5,507	5,507	2,358	2,358
@material-ui/core/TrapFocus	0.00%	0.00%	3,753	3,753	1,578	1,578
@material-ui/core/styles/createMuiTheme	0.00%	0.00%	16,009	16,009	5,791	5,791
@material-ui/core/useMediaQuery	0.00%	0.00%	2,597	2,597	1,102	1,102
@material-ui/lab	0.00%	0.00%	140,242	140,242	43,458	43,458
@material-ui/styles	0.00%	0.00%	51,698	51,698	15,348	15,348
@material-ui/system	0.00%	0.00%	15,420	15,420	4,391	4,391
Button	0.00%	0.00%	84,316	84,316	25,722	25,722
Modal	0.00%	0.00%	14,427	14,427	5,087	5,087
Portal	0.00%	0.00%	3,473	3,473	1,572	1,572
Slider	0.00%	0.00%	74,921	74,921	23,297	23,297
colorManipulator	0.00%	0.00%	3,904	3,904	1,544	1,544
docs.landing	-0.90%	-0.94%	54,833	54,338	13,892	13,762
docs.main	+0.04% 🔺	+0.08% 🔺	647,279	647,549	203,913	204,080
packages/material-ui/build/umd/material-ui.production.min.js	0.00%	0.00%	293,180	293,180	84,176	84,176

Generated by 🚫 dangerJS against f2b702f

[oliviertassinari]

I have moved the ad icon change into a different pull request: #16438.

updated

[oliviertassinari]

rebased.