[libunwind] [libunwind] Remove needless `sys/uio.h` (PR #97495)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libunwind

Author: Izaak Schroeder (izaakschroeder)

<details>
<summary>Changes</summary>

No reference to `readv` or `writev`.

---
Full diff: https://github.com/llvm/llvm-project/pull/97495.diff


1 Files Affected:

- (modified) libunwind/src/UnwindCursor.hpp (-1) 


``````````diff
diff --git a/libunwind/src/UnwindCursor.hpp b/libunwind/src/UnwindCursor.hpp
index 66fe8e2a32cca..677e842d8a22b 100644
--- a/libunwind/src/UnwindCursor.hpp
+++ b/libunwind/src/UnwindCursor.hpp
@@ -36,7 +36,6 @@
 #include <errno.h>
 #include <signal.h>
 #include <sys/syscall.h>
-#include <sys/uio.h>
 #include <unistd.h>
 #define _LIBUNWIND_CHECK_LINUX_SIGRETURN 1
 #endif

``````````

</details>


https://github.com/llvm/llvm-project/pull/97495