remove the pull_request env var

Author: misrasaurabh1

.github/workflows/codeflash-optimize.yaml

@@ -20,7 +20,6 @@ jobs:
       CODEFLASH_AIS_SERVER: prod
       POSTHOG_API_KEY: ${{ secrets.POSTHOG_API_KEY }}
       CODEFLASH_API_KEY: ${{ secrets.CODEFLASH_API_KEY }}
-      CODEFLASH_PR_NUMBER: ${{ github.event.number }}
       COLUMNS: 110
     steps:
       - name: 🛎️ Checkout
@@ -40,4 +39,4 @@ jobs:
       - name: ⚡️Codeflash Optimization
         id: optimize_code
         run: |
-          uv run codeflash --benchmark
+          uv run codeflash --benchmark