Remove trivial & single-usage chain decorator

i3pystatus/core/modules.py

@@ -40,9 +40,9 @@ class Module(SettingsBase):
         elif button == 3:  # Right mouse button
             self.on_rightclick()
 
-    @chain
     def move(self, position):
         self.position = position
+        return self
 
     def on_leftclick(self):
         pass

i3pystatus/core/util.py

@@ -10,15 +10,6 @@ from i3pystatus.core.exceptions import *
 from i3pystatus.core.imputil import ClassFinder
 
 
-def chain(fun):
-    """Method decorator to implicitly return `self` from the decorated method
-    """
-    def chained(self, *args, **kwargs):
-        fun(self, *args, **kwargs)
-        return self
-    return chained
-
-
 def lchop(string, prefix):
     """Removes a prefix from string