MNT: Remove *args for OffsetBox.__init__()

*args were passed on to Artist.__init__(), but Artist does not accept
any positional parameters. Passing any positional parameters to
Offsetbox would thus have always failed internally. It is thus clearer
to not accept any positional parameters for OffsetBox in the first place
.

Author: timhoffm

lib/matplotlib/offsetbox.py

@@ -206,10 +206,10 @@ class OffsetBox(martist.Artist):
     The child artists are meant to be drawn at a relative position to its
     parent.
 
-    Being an artist itself, all parameters are passed on to `.Artist`.
+    Being an artist itself, all keyword arguments are passed on to `.Artist`.
     """
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args)
+    def __init__(self, **kwargs):
+        super().__init__()
         self._internal_update(kwargs)
         # Clipping has not been implemented in the OffsetBox family, so
         # disable the clip flag for consistency. It can always be turned back