Phase 2 sample code conversions per instructions in doc: https://docs.google.com/document/d/1QqnVK8Mc0O1gU9ctPrs-JJ42V9_dHCuEttD_01pXh34/edit
**Included**
1. ajs-quick-reference
Minor changes to remove references to NgModule. Converted sample to standalone.
2. architecture
Migrated the code sample. Made minor changes to remove references to NgModule. I explicitly deprecated the `architecture-module.md` page and removed it from the navigation.
4. deprecations / deprecations-guide
Migrated the code sample which required pulling NgModule and Reactive Forms material into a new `deprecated` folder. Made minor changes to clarify when advice was specific to NgModule (see `loadChildren` in particular).
5. displaying-data
Deleted this `displaying-data` sample entirely as there is no need for a sample app just to display a single, vanilla data binding in the deprecated `zone.md` page. Replaced reference in `zone.md` with an inline code snippet.
10. ngcontainer
Converted the code sample. There is no guide page for this sample. It can be displayed in Stackblitz
**Excluded**
3. cli-builder
Code sample is not an app; nothing to convert.
6-9 - related to getting-started and setup.
Waiting until Angular team is ready to proceed.
11. providers
This is in its own commit and PR 51918 because it may not make sense to convert. See that PR for details.
12. routing-with-urlmatcher
No work needed. Already Standalone.
13 schematics-for-libraries
Non-trivial (see doc notes) and Angular may decide to leave as is. Should have own PR.
14 setup
Non-trivial (see doc notes) and Angular may decide to leave as is. Should have own PR.
PR Close#51918
The `ReflectiveInjector` symbol has been deprecated in v5 (11 major versions ago). This commit removes ReflectiveInjector and related symbols.
BREAKING CHANGE: The `ReflectiveInjector` and related symbols were removed. Please update the code to avoid references to the `ReflectiveInjector` symbol. Use `Injector.create` as a replacement to create an injector instead.
PR Close#48103
These changes include
- Remove the usage of `enableProdMode`
- Remove `test.ts`, `polyfills.ts`, `karma.conf.js` and environment files which are no longer generated by default
PR Close#47904
