docs: remove mention of unused `Intl` polyfill (#40883)
docs: remove mention of unused `Intl` polyfill (#40883)

Since `Intl` API was dropped to use to improve browser support,
it is no longer needed as a polyfill to test Angular.

PR Close #40883

angular/angular,manekinekko/angular,brandonroberts/angular,alxhub/angular,mgechev/angular,JiaLiPassion/angular,alxhub/angular,ocombe/angular,alxhub/angular,gnomeontherun/angular,JiaLiPassion/angular,shairez/angular,angular-indonesia/angular,brandonroberts/angular,manekinekko/angular,manekinekko/angular,angular-indonesia/angular,mgechev/angular,gkalpak/angular,gnomeontherun/angular,mgechev/angular,angular-indonesia/angular,ocombe/angular,gkalpak/angular,brandonroberts/angular,ocombe/angular,ocombe/angular,JiaLiPassion/angular,ocombe/angular,gnomeontherun/angular,shairez/angular,angular/angular,shairez/angular,gkalpak/angular,brandonroberts/angular,ocombe/angular,angular/angular,mgechev/angular,angular-indonesia/angular,shairez/angular,manekinekko/angular,angular/angular,brandonroberts/angular,alxhub/angular,manekinekko/angular,gkalpak/angular,JiaLiPassion/angular,shairez/angular,alxhub/angular,brandonroberts/angular,manekinekko/angular,mgechev/angular,gnomeontherun/angular