[Pre6] Blazor custom cache removed

[maraf]

In dotnet/runtime#114901 we have removed custom cache.
Since we now rely on standard web technologies, like fingerprinting files, using import maps, doesn't have real value anymore.

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• ID: ff5214c7-71a8-7eff-4b50-826984fab930
• Version Independent ID: ff5214c7-71a8-7eff-4b50-826984fab930
• Platform ID: f2a95732-1aed-0e44-d733-8f050410565a
• Content: ASP.NET Core Blazor WebAssembly .NET bundle caching and integrity check failures
• Content Source: aspnetcore/blazor/host-and-deploy/webassembly/bundle-caching-and-integrity-check-failures.md
• Service: aspnet-core
• Sub-service: blazor
• GitHub Login: @guardrex
• Microsoft Alias: wpickett

[guardrex]

@maraf ... A few questions on this one ...

1. This is for Preview 6?

2. Can you let me know if the entire following article should now be dropped out at 10.0 and later ...

   https://learn.microsoft.com/en-us/aspnet/core/blazor/host-and-deploy/webassembly/bundle-caching-and-integrity-check-failures?view=aspnetcore-10.0

3. Does this change affect the caching that the service worker does in PWAs? For example, the caching discussed for PWAs is described in ...

   https://learn.microsoft.com/en-us/aspnet/core/blazor/progressive-web-app?view=aspnetcore-9.0&tabs=visual-studio#cache-first-fetch-strategy

   https://learn.microsoft.com/en-us/aspnet/core/blazor/fundamentals/configuration?view=aspnetcore-10.0#cached-configuration

4. For places where a passing remark is made about asset caching, for example ...

   The .NET runtime and app bundle are downloaded and cached when the WebAssembly component is initially rendered.

   It's helpful for maintaining the docs (and cheaper 💰) to avoid versioning content as much as possible. I'd like to see if we can drop just the "and cached" language from remarks like that and avoid versioning sentences, whole paragraphs, and entire bullet lists just get rid of small passing remarks about caching. I'll ping you on the PR for the changes so that you can let me know if some bit of knocked out language is critical to keep for prior releases. In those cases, we'll bite the bullet and version the text. Sound good?

[maraf]

1. Yes
2. Partially, but not completely. Browser still validates integrity, but thanks to files being fingerprinted (= unique urls), we don't need to do the dance with always fetching boot config & validating what changed manually, instead browser do it on its own. Also this section blazor.js query param is mostly obsolete thanks to fingerprinting.
3. No, PWA is not affected
4. In fact, the assets are still cached, using standard web mechanisms for caching, we only dropped the additional cache layer, that is not needed anymore