[llvm] [Github] Remove redundant 'START_REV', 'END_REV' env variables (NFC) (PR #154218)

[Baranov Victor via llvm-commits]

https://github.com/vbvictor created https://github.com/llvm/llvm-project/pull/154218

After https://github.com/llvm/llvm-project/pull/133023, `START_REV` and `END_REV` env variables became redundant.

>From 361b7221f9db0e948e49938220ef537619087807 Mon Sep 17 00:00:00 2001
From: Victor Baranov <bar.victor.2002 at gmail.com>
Date: Tue, 19 Aug 2025 01:52:30 +0300
Subject: [PATCH] [Github] Remove redundant 'START_REV', 'END_REV' env
 variables (NFC)

---
 .github/workflows/pr-code-format.yml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/.github/workflows/pr-code-format.yml b/.github/workflows/pr-code-format.yml
index dc55b7e47e111..5540555ae05ed 100644
--- a/.github/workflows/pr-code-format.yml
+++ b/.github/workflows/pr-code-format.yml
@@ -70,8 +70,6 @@ jobs:
       - name: Run code formatter
         env:
           GITHUB_PR_NUMBER: ${{ github.event.pull_request.number }}
-          START_REV: ${{ github.event.pull_request.base.sha }}
-          END_REV: ${{ github.event.pull_request.head.sha }}
           CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
         # Create an empty comments file so the pr-write job doesn't fail.
         run: |