Drop redundant polyfills

[keithamus]

This drops the following polyfills from the codebase:

• AggregateError - supported in Safari 14+, Firefox ESR+, and Serenity LadyBird.
• Promise.allSettled - supported in Safari 13+, Firefox ESR+, and Serenity LadyBird.
• Promise.any - supported in Safari 14+, Firefox ESR+, and Serenity LadyBird.
• Element.prototype.replaceChildren - supported in Safari 14+, Firefox ESR+, and Serenity LadyBird
• String.prototype.replaceAll - supported in Safari 13.1+, Firefox ESR+, and Serenity LadyBird

Given how we think about browsers, these polyfills are not required for the vast majority of our traffic:

AggregateError

Browser	Supported Since	Latest Version	% Supported	% Unsupported
chrome	85	101	70.773	0.075
edge	85	100	9.448	0.004
firefox	79	100	12.343	0.020
firefox_android	79	100	0.262	0.000
ie	Not Supported	11	0.000	0.008
opera	71	86	1.567	0.000
safari	14	15.4	3.979	0.021
safari_ios	14	15.4	1.086	0.044
samsunginternet_android	14.0	16.0	0.089	0.000
webview_android	85	101	0.007	0.021
Total:			99.554	0.193

Promise.allSettled

Browser	Supported Since	Latest Version	% Supported	% Unsupported
chrome	76	101	70.807	0.041
edge	79	100	9.450	0.003
firefox	71	100	12.356	0.007
firefox_android	79	100	0.262	0.000
ie	Not Supported	11	0.000	0.008
opera	63	86	1.567	0.000
safari	13	15.4	3.990	0.010
safari_ios	13	15.4	1.091	0.039
samsunginternet_android	12.0	16.0	0.089	0.000
webview_android	76	101	0.008	0.021
Total:			99.62	0.129

Promise.any

Browser	Supported Since	Latest Version	% Supported	% Unsupported
chrome	85	101	70.773	0.075
edge	85	100	9.448	0.004
firefox	79	100	12.343	0.020
firefox_android	79	100	0.262	0.000
ie	Not Supported	11	0.000	0.008
opera	71	86	1.567	0.000
safari	14	15.4	3.979	0.021
safari_ios	14	15.4	1.086	0.044
samsunginternet_android	14.0	16.0	0.089	0.000
webview_android	85	101	0.007	0.021
Total:			99.554	0.193

Element.prototype.replaceChildren

Browser	Supported Since	Latest Version	% Supported	% Unsupported
chrome	86	101	70.687	0.160
edge	86	100	9.448	0.005
firefox	78	100	12.355	0.008
firefox_android	79	100	0.262	0.000
ie	Not Supported	11	0.000	0.008
opera	72	86	1.567	0.000
safari	14	15.4	3.979	0.021
safari_ios	14	15.4	1.086	0.044
samsunginternet_android	14.0	16.0	0.089	0.000
webview_android	86	101	0.007	0.021
Total:			99.48	0.267

String.prototype.replaceAll

Browser	Supported Since	Latest Version	% Supported	% Unsupported
chrome	85	101	70.773	0.075
edge	85	100	9.448	0.004
firefox	77	100	12.355	0.008
firefox_android	79	100	0.262	0.000
ie	Not Supported	11	0.000	0.008
opera	71	86	1.567	0.000
safari	13.1	15.4	3.990	0.010
safari_ios	13.4	15.4	1.088	0.042
samsunginternet_android	14.0	16.0	0.089	0.000
webview_android	85	101	0.007	0.021
Total:			99.579	0.168

[jfuchs]

@keithamus hi! is this ready for review?

[keithamus]

Sure, it can be. This is a BREAKING change. We could wait until September when Safari 17 is likely to be released.

[dgreif]

👋 hello from October 😄. Looks like Safari 17 is out, so we should be ready to officially drop Safari 13/14 🔥. @keithamus would you mind fixing up the conflicts on this? Or I can take a look as FR next week if you are busy on other projects

[keithamus]

Between passion week this week and ActionMenu work next week I might not get round to it, but I'll try to, unless you beat me to it 😉