[setup] the whole jsdist definition is not needed as there is no js to compile

setup.py

 #!/usr/bin/env python
 # pylint: disable=W0142,W0403,W0404,W0613,W0622,W0622,W0704,R0904,C0103,E0611
 #
-# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2003-2020 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
 #
 # This file is part of CubicWeb.
@@ -26,15 +26,6 @@ __docformat__ = "restructuredtext en"
 from os.path import join, dirname
 
 from setuptools import find_packages, setup
-from setuptools.command.sdist import sdist
-
-
-class jsdist(sdist):
-    def run(self):
-        self.spawn(["npm", "install"])
-        self.spawn(["npm", "run", "build"])
-        sdist.run(self)
-
 
 here = dirname(__file__)
 
@@ -89,5 +80,4 @@ setup(
         ],
     },
     zip_safe=False,
-    cmdclass={"jsdist": jsdist},
 )