Remove @angular/http dep

[timdeschryver]

The @angular/http package has been deprecated.
From what I can see we're not depending on it, thus this can be removed?

[santoshyadavdev]

@timdeschryver let me try this one.

[santoshyadavdev]

Hi @timdeschryver ,
We need to wait I think till Angular 8 or update to angular 8.0 rc as platform-server still depends on @angular/http.

https://github.com/angular/angular/blob/8.0.0-beta.10/packages/platform-server/package.json#L20

[timdeschryver]

The RC version has removed the dep - https://github.com/angular/angular/blob/8.0.0-rc.2/packages/platform-server/package.json

[santoshyadavdev]

Ok, I was not sure if we need to update other packages, but in that case, we need to update everything to rc.

[brandonroberts]

Fixed via #1795