use locally built rv32emu

Author: henrybear327

.github/workflows/benchmark.yml

@@ -25,10 +25,6 @@ jobs:
         run: |
             sudo pip3 install numpy
         shell: bash
-      - name: default build
-        if: ${{ steps.changed-files.outputs.any_changed == 'true' ||
-            github.event_name == 'workflow_dispatch'}}
-        run: make
       - name: Run benchmark
         if: ${{ steps.changed-files.outputs.any_changed == 'true' ||
             github.event_name == 'workflow_dispatch'}}