Empty style tag when one or more components don't have styles

Affected Package

The issue is caused by package @angular/angular

Is this a regression?

This happens in all versions of Angular

Description

When several components are added to a template and one or more of them do not have defined styles, an empty style tag appears in the header.
The desired result would be that this empty label was not added.

🔬 Minimal Reproduction

https://stackblitz.com/edit/angular-jpfxql
https://angular-jpfxql.stackblitz.io

In the second URL, if we inspect the page we can see an empty style tag in the header corresponding to app.component.css

🌍 Your Environment

Angular Version:
Angular CLI: 8.0.3
Node: 10.15.0
OS: win32 x64
Angular:
...

Package Version

@angular-devkit/architect 0.800.3
@angular-devkit/core 8.0.3
@angular-devkit/schematics 8.0.3
@schematics/angular 8.0.3
@schematics/update 0.800.3
rxjs 6.4.0