Update test_cil.sh to go back to normal CIL-version mechanism (#908)

Fixes #907

.github/workflows/test_cil.sh

@@ -5,7 +5,6 @@ set -euxo pipefail
 mkdir cil_sirf_test
 touch cil_sirf_test/__init__.py
 DEFAULT_CIL_TAG=$(python -c 'import cil; print(f"v{cil.version.version}" if cil.version.commit_hash == "-1" else cil.version.commit_hash[1:])' | tail -n1)
-DEFAULT_CIL_TAG=master  # TODO: revert after CIL 24.0.0 release https://github.com/TomographicImaging/CIL/issues/1732
 for fname in test_SIRF.py utils.py testclass.py; do
   curl -fsSL https://raw.githubusercontent.com/TomographicImaging/CIL/$DEFAULT_CIL_TAG/Wrappers/Python/test/$fname > cil_sirf_test/$fname
 done