[llvm] [CodeGen] Remove unused MachineBranchProbabilityInfo from MachineTraceMetrics pass(NFC). (PR #108506)

[Christudasan Devadasan via llvm-commits]

cdevadas wrote:

* **#108507** <a href="https://app.graphite.dev/github/pr/llvm/llvm-project/108507?utm_source=stack-comment-icon" target="_blank"><img src="https://static.graphite.dev/graphite-32x32-black.png" alt="Graphite" width="10px" height="10px"/></a>
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https://github.com/llvm/llvm-project/pull/108506