python312Packages.jaconv: do not include unnecessary files

`data_files` installs into Python's installation prefix (not into the directory of the python module), potentially causing collisions if other packages do the same (with such general files).

pkgs/development/python-modules/jaconv/default.nix

@@ -21,7 +21,10 @@ buildPythonPackage rec {
     hash = "sha256-9ruhOLaYNESeKOwJs3IN6ct66fSq7My9DOyA7/cH3d0=";
   };
 
-  patches = [ ./use-pytest.patch ];
+  patches = [
+    ./fix-packaging.patch
+    ./use-pytest.patch
+  ];
 
   build-system = [ setuptools ];
 

pkgs/development/python-modules/jaconv/fix-packaging.patch

@@ -0,0 +1,12 @@
+diff --git a/setup.py b/setup.py
+index 297357b..12b861f 100644
+--- a/setup.py
++++ b/setup.py
+@@ -39,7 +42,6 @@
+           'Programming Language :: Python :: 3.10',
+           'Programming Language :: Python :: 3.11', 'Topic :: Text Processing'
+       ],
+-      data_files=[('', ['README.rst', 'CHANGES.rst'])],
+       long_description='%s\n\n%s' %
+       (open('README.rst', encoding='utf8').read(),
+        open('CHANGES.rst', encoding='utf8').read()),