Removing the OS dependent ignore logic

Author: bsipocz

ignore_gha_testing

@@ -36,14 +36,6 @@ commands =
     ## Some of the these could be factored out to a separate shell script,
     ## but so far it's simple enought to keep it here.
 
-
-    # Ignore testing the tutorials listed in ignore_testing file. We have some OS specific ignores,
-    # too due to issues with e.g. multiprocessing and problems in upstream dependency
-    !buildhtml: bash -c 'if python -c "import platform; print(platform.platform())" | grep -i macos; then cat ignore_osx_testing >> ignore_testing; fi'
-    !buildhtml: bash -c 'if python -c "import platform; print(platform.platform())" | grep -i win; then cat ignore_windows_testing >> ignore_testing; fi'
-
-    !buildhtml: bash -c 'if [[ $CI == true ]]; then cat ignore_gha_testing >> ignore_testing; fi'
-
     # We only want to run CI in PRs for the notebooks we touched
     !buildhtml: bash -c 'if [[ $GITHUB_EVENT_NAME == pull_request && -z "$(grep force_run:all_tests ${GITHUB_EVENT_PATH})" ]]; then git fetch origin main --depth=1; git diff origin/main --name-only tutorials | grep .md; else find tutorials -name "*.md"; fi | grep -vf ignore_testing | xargs jupytext --to notebook '