File unpin-cython.patch of Package python-tesserocr

Index: tesserocr-2.8.0/setup.py
===================================================================
--- tesserocr-2.8.0.orig/setup.py
+++ tesserocr-2.8.0/setup.py
@@ -318,7 +318,7 @@ setup(
     cmdclass={"build_ext": my_build_ext},
     ext_modules=[make_extension()],
     test_suite="tests",
-    setup_requires=["Cython>=0.23,<3.1.0"],
+    setup_requires=["Cython>=0.23"],
     packages=["tesserocr"],
     package_dir={"tesserocr": "tesserocr"},
 )