[llvm] [NFC][Coroutines] Remove redundant checks for replacing PrepareFns (PR #98392)

[Yuxuan Chen via llvm-commits]

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@@ -2108,12 +2108,6 @@ PreservedAnalyses CoroSplitPass::run(LazyCallGraph::SCC &C,
   if (Coroutines.empty() && PrepareFns.empty())
     return PreservedAnalyses::all();
 
-  if (Coroutines.empty()) {
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yuxuanchen1997 wrote:

Because the next lines reads "for each coroutine in Coroutines". It's the same condition the if statement is checking for, then execute the exact same logic.

https://github.com/llvm/llvm-project/pull/98392