[MRG] Removed doc release from quickstart guide (#744)

* release version for examples

* release indication on examples

* change added in release.md + minor modifs on examples added in 0.9.6

* removed release documentation from quickstart guide

* added previous change in releases.md

---------

Co-authored-by: Rémi Flamary <remi.flamary@gmail.com>

Author: NailKhelifa

RELEASES.md

@@ -18,6 +18,7 @@
 - Updated documentation Quickstart guide and User guide with new API (PR #726)
 - Fix jax version for auto-grad (PR #732)
 - Added to each example in the examples gallery the information about the release version in which it was introduced (PR #743)
+- Removed release information from quickstart guide (PR #744)
 
 #### Closed issues
 - Fixed `ot.mapping` solvers which depended on deprecated `cvxpy` `ECOS` solver (PR #692, Issue #668)

examples/plot_quickstart_guide.py

@@ -4,9 +4,6 @@
 Quickstart Guide
 =============================================
 
-.. note::
-    Example added in release: 0.9.6
-
 Quickstart guide to the POT toolbox.
 
 For better readability, only the use of POT is provided and the plotting code