In CLI version 12, we introduced the concept of production builds by default.
With this change we update the documentation to reflect the changes.
More information about the change can be found https://github.com/angular/angular-cli/pull/20128
PR Close#41173
The `format` attribute is an artifact of an old version of the docs
tooling (before moving it into the angular/angular repo) and no longer
does anything. People are still copy-pasting it from existing examples.
This commit removes all occurrences of the `format` attribute on code
examples.
PR Close#31674
