LowerTypeTests: Remove the optimization for llvm.cond.loop. Because in the new IR pattern for conditional traps the llvm.cond.loop is generated late, the LowerTypeTests pass will never see it, so we no longer need to be able to optimize it. Therefore, remove the code for optimizing it. This reverts commit 1de721c414407f4b92d3e2458ce9ca38563cef9c. Reviewers: fmayer, vitalybuka Reviewed By: fmayer Pull Request: https://github.com/llvm/llvm-project/pull/181301
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