Remove intermediary variable `readers_all`

Inst_eddies/Analysis/anim_eddy_contours.py

@@ -44,7 +44,6 @@ def anim_eddies(fig, ax, handlers, window, d_min, d_max, light):
     """handlers is a list."""
 
     ishape_lists_all = []
-    readers_all = []
     
     for handler in handlers:
         ishape_lists = {d:
@@ -54,13 +53,13 @@ def anim_eddies(fig, ax, handlers, window, d_min, d_max, light):
                                 window)
                         for d in range(d_min, d_max + 1)}
         ishape_lists_all.append(ishape_lists)
-        readers_all.append(handler["readers"])
 
     if window is None:
         bbox = None
         
-        for readers, ishape_lists in zip(readers_all, ishape_lists_all):
-            b2 = compute_bbox(ishape_lists, readers["outermost_contour"])
+        for handler, ishape_lists in zip(handlers, ishape_lists_all):
+            b2 = compute_bbox(ishape_lists,
+                              handler["readers"]["outermost_contour"])
             bbox = bbox_union(bbox, b2)
     else:
         bbox = window