Removed .combinations() being featured as new

... but it has been kept to offer a place where all three combinatory
methods can be quickly compared to each other

Author: danielhenrymantilla

README.rst

@@ -74,37 +74,36 @@ Recent Changes
 
       ; by `@tobz1000 <https://github.com/tobz1000>`_
 
-    - `.combinations(k) <https://docs.rs/itertools/0.8.1/itertools/trait.Itertools.html#method.combinations>`_:
+    - `.combinations_with_replacement(k) <https://docs.rs/itertools/0.8.1/itertools/trait.Itertools.html#method.combinations_with_replacement>`_:
 
-      ``[0, 1, 2].iter().combinations(2)`` yields
+      ``[0, 1, 2].iter().combinations_with_replacement(2)`` yields
 
       .. code:: rust
 
         [
+            vec![0, 0],
             vec![0, 1],
             vec![0, 2],
+            vec![1, 1],
             vec![1, 2],
+            vec![2, 2],
         ]
 
-      ; by `@tobz1000 <https://github.com/tobz1000>`_
+      ; by `@tommilligan <https://github.com/tommilligan>`_
 
-    - `.combinations_with_replacement(k) <https://docs.rs/itertools/0.8.1/itertools/trait.Itertools.html#method.combinations_with_replacement>`_:
+    - For reference, these methods join the already existing
+      `.combinations(k) <https://docs.rs/itertools/0.8.1/itertools/trait.Itertools.html#method.combinations>`_:
 
-      ``[0, 1, 2].iter().combinations_with_replacement(2)`` yields
+      ``[0, 1, 2].iter().combinations(2)`` yields
 
       .. code:: rust
 
         [
-            vec![0, 0],
             vec![0, 1],
             vec![0, 2],
-            vec![1, 1],
             vec![1, 2],
-            vec![2, 2],
         ]
 
-      ; by `@tommilligan <https://github.com/tommilligan>`_
-
   - Improved the performance of `.fold() <https://docs.rs/itertools/0.8.1/itertools/trait.Itertools.html#method.fold>`_-based internal iteration for the
     `.intersperse() <https://docs.rs/itertools/0.8.1/itertools/trait.Itertools.html#method.intersperse>`_ iterator
     ; by `@jswrenn <https://github.com/jswrenn>`_