move Torch to optional dependencies (to avoid clash with TF over CuDNN)

pyproject.toml

@@ -25,6 +25,10 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Image Processing",
 ]
 
+[project.optional-dependencies]
+OCR = ["torch <= 2.0.1", "transformers <= 4.30.2"]
+plotting = ["matplotlib"]
+
 [project.scripts]
 eynollah = "eynollah.cli:main"
 ocrd-eynollah-segment = "eynollah.ocrd_cli:main"

requirements.txt

@@ -4,8 +4,4 @@ numpy <1.24.0
 scikit-learn >= 0.23.2
 tensorflow < 2.13
 imutils >= 0.5.3
-matplotlib
-setuptools >= 50
-transformers <= 4.30.2
-torch <= 2.0.1
 numba <= 0.58.1