Remove Blazor internal profiling infrastructure #24468
Merged
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This removes the internal profiling infrastructure previously added in #23510, because:
This PR also removes the JS-side profiling infrastructure, even though we don't have a similar replacement for it. I'm proposing to remove it because it's less useful (the JS-side code is already very tight, and the scenarios we're trying to optimize are now much heavier on the .NET side), it's not too hard to temporarily wire in a bit of timings capture code on an ad-hoc basis if you do want to measure something in JS, and it was quite a bit of extra JS code to be deploying into everyone's app which they couldn't even use.