pythonPackages.lz4: remove in favor of pythonPackages.python-lz4

lz4 packages the same package as python-lz4, but an outdated version

pkgs/development/python-modules/lz4/default.nix

@@ -1,29 +0,0 @@
-{ stdenv
-, buildPythonPackage
-, fetchPypi
-, pytestrunner
-, pytest
-, psutil
-, pkgconfig
-, setuptools_scm
-}:
-
-buildPythonPackage rec {
-  pname = "lz4";
-  version = "2.1.2";
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "ec265f7c3fc3df706e9579bde632ceeef9278858d7ae87c376a2954d11e9ea39";
-  };
-
-  buildInputs = [ setuptools_scm pytestrunner pkgconfig ];
-  checkInputs = [ pytest psutil ];
-
-  meta = with stdenv.lib; {
-    description = "Compression library";
-    homepage = https://github.com/python-lz4/python-lz4;
-    license = licenses.bsd3;
-  };
-
-}