[REM] developer/upgrade: remove outdated page

task-2613841

closes odoo#1082

X-original-commit: eee063a
Signed-off-by: Antoine Vandevenne (anv) <[email protected]>

Author: Donapi

content/contributing/documentation/rst_cheat_sheet.rst

@@ -520,7 +520,7 @@ Document metadata
 +-----------------+--------------------------------------------------------------------------------+
 | `code-column`   |  | Show a dynamic side column that can be used to display interactive          |
 |                 |    tutorials or code excerpts.                                                 |
-|                 |  | For example, see :doc:`/developer/misc/api/upgrade` or                      |
+|                 |  | For example, see                                                            |
 |                 |    :doc:`/applications/finance/accounting/getting_started/memento`.            |
 +-----------------+--------------------------------------------------------------------------------+
 | `hide-page-toc` | Hide the "On this page" sidebar and use full page width for the content.       |

content/developer/misc/api.rst

@@ -9,4 +9,3 @@ API
 
     api/odoo
     api/iap
-    api/upgrade