Remove unused taper kwarg

spectral_cube/cube_utils.py

@@ -1112,11 +1112,6 @@ def update(self, n=1):
                     hdul.flush() # write to disk on each iteration
                 super().update(n)
 
-    # Apply a small edge taper to the weights to ensure a smooth
-    # transition between cubes with adjacent spatial coverage.
-    if taper_weight_edge and weightcubes is not None:
-        pass
-
     if method == 'cube':
         log_("Using Cube method")
         # Cube method: Regrid the whole cube in one operation.