Remove custom bench env yaml

Author: dcherian

.github/workflows/benchmarks.yml

@@ -24,11 +24,12 @@ jobs:
       - name: Set up conda environment
         uses: mamba-org/setup-micromamba@v1
         with:
-          environment-file: ci/benchmark.yml
-          environment-name: flox-tests
           init-shell: bash
           cache-environment: true
-
+          create-args: >-
+            python=3.10
+            asv
+            mamba
       - name: Run benchmarks
         shell: bash -l {0}
         id: benchmark