build(docs-infra): remove unnecessary workaround for RxJS in `ng-packages-installer` (#28510)
build(docs-infra): remove unnecessary workaround for RxJS in `ng-packages-installer` (#28510)

Since b43f8bc7d, RxJS does not need to be patched any more in the
top-level `node_modules/`, so we don't need to special-case RxJS in
`ng-package-installer` and use `node_modules/rxjs/`.

PR Close #28510

shairez/angular,mgechev/angular,IgorMinar/angular,mlaval/angular,vikerman/angular,alxhub/angular,JiaLiPassion/angular,mlaval/angular,gkalpak/angular,Brocco/angular,blesh/angular,hansl/angular,angular-indonesia/angular,gnomeontherun/angular,gdi2290/angular,shairez/angular,hansl/angular,IgorMinar/angular,vikerman/angular,Toxicable/angular,hansl/angular,shairez/angular,mlaval/angular,mprobst/angular,jasonaden/angular,petebacondarwin/angular,JiaLiPassion/angular,jasonaden/angular,petebacondarwin/angular,Toxicable/angular,IdeaBlade/angular,ocombe/angular,filipesilva/angular,brandonroberts/angular,IgorMinar/angular,Brocco/angular,mhevery/angular,manekinekko/angular,angular/angular,jasonaden/angular,blesh/angular,wKoza/angular,wKoza/angular,mlaval/angular,brandonroberts/angular,hansl/angular,manekinekko/angular,alexeagle/angular,ocombe/angular,gnomeontherun/angular,snaptech/angular,JiaLiPassion/angular,gdi2290/angular,mgechev/angular,filipesilva/angular,jasonaden/angular,IgorMinar/angular,Toxicable/angular,StephenFluin/angular,shairez/angular,petebacondarwin/angular,gdi2290/angular,mhevery/angular,manekinekko/angular,StephenFluin/angular,Brocco/angular,alxhub/angular,angular/angular,petebacondarwin/angular,juristr/angular,sarunint/angular,matsko/angular,alexeagle/angular,angular-indonesia/angular,gdi2290/angular,mprobst/angular,gdi2290/angular,Brocco/angular,vikerman/angular,mhevery/angular,sarunint/angular,angular-indonesia/angular,mhevery/angular,ocombe/angular,StephenFluin/angular,alexeagle/angular,snaptech/angular,snaptech/angular,ocombe/angular,vikerman/angular,matsko/angular,mgechev/angular,mlaval/angular,matsko/angular,petebacondarwin/angular,ocombe/angular,gnomeontherun/angular,sarunint/angular,mprobst/angular,shairez/angular,mprobst/angular,manekinekko/angular,wKoza/angular,angular/angular,IdeaBlade/angular,mgechev/angular,StephenFluin/angular,gdi2290/angular,filipesilva/angular,mhevery/angular,matsko/angular,mhevery/angular,gkalpak/angular,mprobst/angular,sarunint/angular,Toxicable/angular,alxhub/angular,juristr/angular,vikerman/angular,Toxicable/angular,brandonroberts/angular,wKoza/angular,brandonroberts/angular,mgechev/angular,mprobst/angular,brandonroberts/angular,manekinekko/angular,Brocco/angular,petebacondarwin/angular,juristr/angular,manekinekko/angular,hansl/angular,matsko/angular,alxhub/angular,alexeagle/angular,blesh/angular,IdeaBlade/angular,ocombe/angular,IgorMinar/angular,gnomeontherun/angular,IdeaBlade/angular,blesh/angular,IdeaBlade/angular,IgorMinar/angular,juristr/angular,wKoza/angular,vikerman/angular,brandonroberts/angular,juristr/angular,snaptech/angular,filipesilva/angular,gkalpak/angular,jasonaden/angular,juristr/angular,alxhub/angular,blesh/angular,JiaLiPassion/angular,gkalpak/angular,Toxicable/angular,snaptech/angular,StephenFluin/angular,snaptech/angular,sarunint/angular,alexeagle/angular,Brocco/angular,wKoza/angular,jasonaden/angular,angular-indonesia/angular,angular/angular,hansl/angular,alexeagle/angular,filipesilva/angular,sarunint/angular