fix(2448): remove abort controller polyfill

[JulienKode]

Description

In this PR we remove abort controller https://github.com/reduxjs/redux-toolkit/issues/2448

Where should I add in the docs that ?

• For people that are using redux with a node.js server they:
  • need node.js 15 or have to polyfill AbortController

I'll update specs and add docs if we are ok

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[phryneas]

Let's target that for a 2.0 release :)

[JulienKode]

@phryneas @markerikson let me know if I need to do any changes

[markerikson]

Belated, but thank you!

[JulienKode]

Thanks for merging it