[clang] [Clang][NFC] Avoid opening namespace std (PR #95470)

[via cfe-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff 45964eb9b88c46045e4e84beb4e2135cdeed6855 f5fc162cd1a6fdef3dcdc3e4c73aedcf67b603df -- clang/include/clang/Format/Format.h clang/include/clang/Frontend/PrecompiledPreamble.h clang/include/clang/Frontend/SerializedDiagnosticReader.h clang/lib/StaticAnalyzer/Checkers/BlockInCriticalSectionChecker.cpp
``````````

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/clang/include/clang/Frontend/SerializedDiagnosticReader.h b/clang/include/clang/Frontend/SerializedDiagnosticReader.h
index 96d576a63b..f7c2012a76 100644
--- a/clang/include/clang/Frontend/SerializedDiagnosticReader.h
+++ b/clang/include/clang/Frontend/SerializedDiagnosticReader.h
@@ -129,6 +129,7 @@ protected:
 } // namespace clang
 
 template <>
-struct std::is_error_code_enum<clang::serialized_diags::SDError> : std::true_type {};
+struct std::is_error_code_enum<clang::serialized_diags::SDError>
+    : std::true_type {};
 
 #endif // LLVM_CLANG_FRONTEND_SERIALIZEDDIAGNOSTICREADER_H

``````````

</details>


https://github.com/llvm/llvm-project/pull/95470