[llvm] [nfc]remove unused variable after pr/81691 (PR #82578)

[Mingming Liu via llvm-commits]

https://github.com/minglotus-6 created https://github.com/llvm/llvm-project/pull/82578

None

>From 4f13252a9ee05c863b3c4f11be4d8cdbbe6cd615 Mon Sep 17 00:00:00 2001
From: mingmingl <mingmingl at google.com>
Date: Wed, 21 Feb 2024 21:08:21 -0800
Subject: [PATCH] [nfc]remove unused variable

---
 llvm/lib/ProfileData/InstrProfWriter.cpp | 1 -
 1 file changed, 1 deletion(-)

diff --git a/llvm/lib/ProfileData/InstrProfWriter.cpp b/llvm/lib/ProfileData/InstrProfWriter.cpp
index e5163ebe8ae37a..3e0a0e0d70116d 100644
--- a/llvm/lib/ProfileData/InstrProfWriter.cpp
+++ b/llvm/lib/ProfileData/InstrProfWriter.cpp
@@ -456,7 +456,6 @@ Error InstrProfWriter::writeImpl(ProfOStream &OS) {
   Header.BinaryIdOffset = 0;
   Header.TemporalProfTracesOffset = 0;
   Header.VTableNamesOffset = 0;
-  int N = sizeof(IndexedInstrProf::Header) / sizeof(uint64_t);
 
   // Only write out the first four fields. We need to remember the offset of the
   // remaining fields to allow back patching later.