ci: remove concurrency from bench (#102)

Author: DaniPopes

.github/workflows/bench.yml

@@ -2,8 +2,6 @@
 
 on:
   pull_request:
-  # TODO: Disabled temporarily for https://github.com/CodSpeedHQ/runner/issues/55
-  # merge_group:
   push:
     branches: [main]
 
@@ -12,10 +10,6 @@ env:
   BASELINE: base
   SEED: alloy-trie
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-  cancel-in-progress: true
-
 name: bench
 jobs:
   codspeed: