Remove Python 3.13 constraints from requirements.txt

The relevant Python packages are now available on Python 3.13 as well,
so we should include them also in the requirements.txt for Python 3.13.

Like this, we increase test coverage in the CI, as the requirements.txt
file is used to build the docker images.

requirements.txt

@@ -5,8 +5,8 @@ numpy
 pandas
 
 # TMVA: SOFIE
-dm-sonnet ; python_version < "3.13"  # used for GNNs, not available for Python 3.13 yet
-graph_nets ; python_version < "3.13" # not available for Python 3.13 yet
+dm-sonnet # used for GNNs
+graph_nets
 onnx
 
 # TMVA: PyMVA interfaces
@@ -16,7 +16,7 @@ torch<2.5 ; python_version < "3.13" # no torch version that fullfills version co
 xgboost
 
 # PyROOT: ROOT.Numba.Declare decorator
-numba>=0.48 ; python_version < "3.13" # no numba available for Python 3.13 yet
+numba>=0.48
 cffi>=1.9.1
 
 # Notebooks: ROOT C++ kernel