[clang] [NFC][OpenACC] Remove 'initExpr' from AST/etc. (PR #161674)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- clang/include/clang/AST/OpenACCClause.h clang/lib/AST/StmtProfile.cpp clang/lib/CIR/CodeGen/CIRGenOpenACCClause.cpp clang/lib/CIR/CodeGen/CIRGenOpenACCRecipe.cpp clang/lib/CIR/CodeGen/CIRGenOpenACCRecipe.h clang/lib/Sema/SemaOpenACC.cpp clang/lib/Serialization/ASTReader.cpp clang/lib/Serialization/ASTWriter.cpp clang/tools/libclang/CIndex.cpp
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``````````diff
diff --git a/clang/include/clang/AST/OpenACCClause.h b/clang/include/clang/AST/OpenACCClause.h
index c67685d14..c343a19a4 100644
--- a/clang/include/clang/AST/OpenACCClause.h
+++ b/clang/include/clang/AST/OpenACCClause.h
@@ -845,9 +845,7 @@ struct OpenACCPrivateRecipe {
 
   bool isSet() const { return AllocaDecl; }
 
-  static OpenACCPrivateRecipe Empty() {
-    return OpenACCPrivateRecipe(nullptr);
-  }
+  static OpenACCPrivateRecipe Empty() { return OpenACCPrivateRecipe(nullptr); }
 };
 
 class OpenACCPrivateClause final

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https://github.com/llvm/llvm-project/pull/161674