sampling: simplify min-p sampling #713
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This was referenced Jan 3, 2025
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As suggested by @aikitoria and @rolandtannous in #710 , we don't need rejection algorithm for min-p sampling, this PR simplifies the design.
There is a breaking change on API: we no longer returns
successarray for min-p sampling because there is no risk of rejecting the samples. In later PRs, we will also remove thesuccessarray in top-p/top-k sampling APIs.