update installation doc to remove non-existing extras

Author: Aethor

docs/installation.rst

@@ -7,10 +7,11 @@ Using Pip
 
 Simply use ``pip install renard-pipeline``.
 
-You can also install the following extras:
+Note that for some modules, you might need to install additional
+libraries:
 
-- ``stanza`` (``pip install renard-pipeline[stanza]``), for the Stanford CoreNLP pipeline
-- ``spacy`` (``pip install renard-pipeline[spacy]``), for the Spacy
+- ``stanza`` (``pip install stanza``), for the Stanford CoreNLP pipeline
+- ``spacy`` (``pip install spacy coreferee``), for the Spacy
   coreference resolver Coreferee
 
 
@@ -22,11 +23,3 @@ The project uses `uv <https://docs.astral.sh/uv/>`_ to manage dependencies. Use
 - ``uv sync`` to install dependencies
 - ``uv run python my_script.py`` to run a script under the virtual
   environment with dependencies
-
-
-If you ever want to use the Stanford CoreNLP pipeline, you must install
-``stanza`` (``pip install stanza``).
-
-If you want to use the Spacy Coreferee coreference solver, you need to
-install ``spacy``, ``spacy-transformers`` and ``corefereee`` (``pip
-install spacy spacy-transformers coreferee``).