[llvm] Remove redundant move in return statement (PR #91210)

[Mehdi Amini via llvm-commits]

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@@ -77,7 +77,7 @@ class TrampolinePool {
     std::lock_guard<std::mutex> Lock(TPMutex);
     if (AvailableTrampolines.empty()) {
       if (auto Err = grow())
-        return std::move(Err);
+        return Err;
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joker-eph wrote:

There is still here the mismatch in the type of Err and the type of the return for the method that led to this error I believe: https://lab.llvm.org/buildbot/#/builders/61/builds/57655

https://github.com/llvm/llvm-project/pull/91210