[llvm] Revert "Reland "[BasicBlockUtils] Handle funclets when detaching EH p… (PR #159292)

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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
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``````````diff
diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index cad0b4c12..4bb3cb2d5 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -58,10 +58,9 @@ static cl::opt<unsigned> MaxDeoptOrUnreachableSuccessorCheckDepth(
              "is followed by a block that either has a terminating "
              "deoptimizing call or is terminated with an unreachable"));
 
-void llvm::detachDeadBlocks(
-    ArrayRef<BasicBlock *> BBs,
-    SmallVectorImpl<DominatorTree::UpdateType> *Updates,
-    bool KeepOneInputPHIs) {
+void llvm::detachDeadBlocks(ArrayRef<BasicBlock *> BBs,
+                            SmallVectorImpl<DominatorTree::UpdateType> *Updates,
+                            bool KeepOneInputPHIs) {
   for (auto *BB : BBs) {
     // Loop through all of our successors and make sure they know that one
     // of their predecessors is going away.
@@ -85,8 +84,7 @@ void llvm::detachDeadBlocks(
       BB->back().eraseFromParent();
     }
     new UnreachableInst(BB->getContext(), BB);
-    assert(BB->size() == 1 &&
-           isa<UnreachableInst>(BB->getTerminator()) &&
+    assert(BB->size() == 1 && isa<UnreachableInst>(BB->getTerminator()) &&
            "The successor list of BB isn't empty before "
            "applying corresponding DTU updates.");
   }

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https://github.com/llvm/llvm-project/pull/159292