Episode 01: remove statement about order in Python dict

The order in Python dictionaries is a delicate issue and is too complex
to describe to a novice learner correctly. Statement that the order in
which key-value pairs are returned in a 'for' loop is not guaranteed, on
the other hand, is no longer correct. We could say
that some "order-dependent" functions do not apply to the
classical Python dictionaries (e.g., reversed, move_to_end), but that
would be an overkill. I think that deleting this statement might
be the best course of action at this moment.

Author: maxim-belkin

_episodes/01-short-introduction-to-Python.md

@@ -459,13 +459,6 @@ for key in rev.keys():
 >
 {: .challenge}
 
-It is important to note that dictionaries are "unordered" and do not remember
-the sequence of their items (i.e. the order in which key:value pairs were
-added to the dictionary). Because of this, the order in which items are
-returned from loops over dictionaries might appear random and can even change
-with time.
-
-
 
 ## Functions