docs: remove outdated parts about Promise.allSettled#3845

jffcm wants to merge 1 commit intojavascript-tutorial:masterjavascript-tutorial/en.javascript.info:masterfrom

jffcm:docs/remove-outdated-promise-allSettled-infojffcm/en.javascript.info:docs/remove-outdated-promise-allSettled-infoCopy head branch name to clipboard