Drop unused codes

1 files changed, 5 insertions, 9 deletions

diff --git a/sphinx/application.py b/sphinx/application.py
index eeaa954eb..f325935ad 100644
--- a/sphinx/application.py
+++ b/sphinx/application.py
@@ -207,15 +207,11 @@ class Sphinx(object):
         # the config file itself can be an extension
         if self.config.setup:
             self._setting_up_extension = ['conf.py']
-            # py31 doesn't have 'callable' function for below check
-            if hasattr(self.config.setup, '__call__'):
-                self.config.setup(self)
-            else:
-                raise ConfigError(
-                    _("'setup' that is specified in the conf.py has not been "
-                      "callable. Please provide a callable `setup` function "
-                      "in order to behave as a sphinx extension conf.py itself.")
-                )
+            raise ConfigError(
+                _("'setup' that is specified in the conf.py has not been "
+                  "callable. Please provide a callable `setup` function "
+                  "in order to behave as a sphinx extension conf.py itself.")
+            )
 
         # now that we know all config values, collect them from conf.py
         self.config.init_values()