docs: WebStorm does not need @angular/language-service anymore (#39637)
docs: WebStorm does not need @angular/language-service anymore (#39637)

Since WebStorm 2019.1, all of Angular Compiler validations has been implemented
as inspections, which has some additional benefits of being able to provide some
basic quick fixes like adding missing selector property, or something as neat as
auto-module import.

See https://intellij-support.jetbrains.com/hc/en-us/community/posts/360009914880

Signed-off-by: Adrien Crivelli <adrien.crivelli@gmail.com>

PR Close #39637

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