bug #1280 Assets manifest is not necessary with Webpack Encore (GromNaN)

This PR was merged into the main branch.

Discussion
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Assets manifest is not necessary with Webpack Encore

Fix breaking changes introduced by #1278

Asset urls generated in `entrypoints.json` https://github.com/symfony/demo/blob/a7a975e2938b0568b493406ce914ac0866b6dd58/public/build/entrypoints.json#L13  are not meant to be mapped with `manifest.json`
https://github.com/symfony/demo/blob/a7a975e2938b0568b493406ce914ac0866b6dd58/public/build/manifest.json#L2

The only place where the twig `asset` function is used, is for a file that is not in the manifest: https://github.com/symfony/demo/blob/a7a975e2938b0568b493406ce914ac0866b6dd58/templates/base.html.twig#L17

Commits
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8e9facc Assets manifest is not necessary with Webpack Encore

config/packages/assets.yaml

@@ -1,4 +1,2 @@
 framework:
-    assets:
-        json_manifest_path: '%kernel.project_dir%/public/build/manifest.json'
-        strict_mode: '%kernel.debug%'
+    assets: ~