[clang] [C99] Remove the tgmath.h header (PR #135236)

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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:
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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- clang/lib/Lex/ModuleMap.cpp
``````````

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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Lex/ModuleMap.cpp b/clang/lib/Lex/ModuleMap.cpp
index f16fe414e..1c2fcaf07 100644
--- a/clang/lib/Lex/ModuleMap.cpp
+++ b/clang/lib/Lex/ModuleMap.cpp
@@ -253,17 +253,17 @@ OptionalFileEntryRef ModuleMap::findHeader(
 /// headers.
 static bool isBuiltinHeaderName(StringRef FileName) {
   return llvm::StringSwitch<bool>(FileName)
-           .Case("float.h", true)
-           .Case("iso646.h", true)
-           .Case("limits.h", true)
-           .Case("stdalign.h", true)
-           .Case("stdarg.h", true)
-           .Case("stdatomic.h", true)
-           .Case("stdbool.h", true)
-           .Case("stddef.h", true)
-           .Case("stdint.h", true)
-           .Case("unwind.h", true)
-           .Default(false);
+      .Case("float.h", true)
+      .Case("iso646.h", true)
+      .Case("limits.h", true)
+      .Case("stdalign.h", true)
+      .Case("stdarg.h", true)
+      .Case("stdatomic.h", true)
+      .Case("stdbool.h", true)
+      .Case("stddef.h", true)
+      .Case("stdint.h", true)
+      .Case("unwind.h", true)
+      .Default(false);
 }
 
 /// Determine whether the given module name is the name of a builtin

``````````

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https://github.com/llvm/llvm-project/pull/135236