Use common version of opm

Author: andreas-el

setup.py

@@ -97,8 +97,7 @@
         "fmu-tools>=1.8",
         "geojson>=2.5.0",
         "jsonschema>=3.2.0",
-        "opm>=2020.10.1,<2023.10; python_version=='3.8' and sys_platform=='linux'",
-        "opm>=2023.10; python_version>'3.8' and sys_platform=='linux'",
+        "opm>=2023.10; sys_platform=='linux'",
         "pandas>=1.1.5,<2.0",
         "pillow>=6.1",
         "pyarrow>=5.0.0",