move pytest-codspeed install into CI only

Author: davidhewitt

.github/workflows/codspeed.yml

@@ -37,7 +37,7 @@ jobs:
       - run: pip uninstall pytest-speed -y
         if: steps.cache-py.outputs.cache-hit != 'true'
 
-      - run: pip install pytest-benchmark==4.0.0
+      - run: pip install pytest-benchmark==4.0.0 pytest-codspeed
         if: steps.cache-py.outputs.cache-hit != 'true'
 
       - name: install rust stable

tests/requirements.txt

@@ -6,8 +6,6 @@ hypothesis==6.111.2
 # pandas doesn't offer prebuilt wheels for all versions and platforms we test in CI e.g. aarch64 musllinux
 pandas==2.1.3; python_version >= "3.9" and python_version < "3.13" and implementation_name == "cpython" and platform_machine == 'x86_64'
 pytest==8.3.3
-# we run codspeed benchmarks on x86_64 CPython (i.e. native github actions architecture)
-pytest-codspeed~=3.0.0; implementation_name == "cpython" and platform_machine == 'x86_64'
 # pytest-examples currently depends on aiohttp via black; we don't want to build
 # it on platforms like aarch64 musllinux in CI
 pytest-examples==0.0.13; implementation_name == "cpython" and platform_machine == 'x86_64'