[llvm] [OpenMP] Add optimization to remove the RPC client (PR #70683)

[Jan Patrick Lehr via llvm-commits]

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@@ -1507,6 +1510,40 @@ struct OpenMPOpt {
     return Changed;
   }
 
+  /// Tries to remove known runtime symbols that are optional.
+  bool removeRuntimeSymbols() {
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jplehr wrote:

It's technically not "remove", right? Would that be more like `privatizeRpcClientGlobal` or so?

https://github.com/llvm/llvm-project/pull/70683