remove duplicate keys

Author: tomdurrant

pyproject.toml

@@ -101,10 +101,6 @@ docs = [
 notebooks = [
     "rompy-notebooks @ git+https://github.com/rom-py/rompy-notebooks.git@package",
 ]
-test = ["pytest", "envyaml", "coverage"]
-extra = ["gcsfs", "zarr", "cloudpathlib[s3,gs,azure]"]
-dev = ["pytest", "envyaml", "coverage", "ruff", "black"]
-docs = ["mkdocs", "mkdocs-material", "mkdocstrings[python]"]
 
 [tool.setuptools.packages.find]
 where = ["src"]