remove 2019 content

Author: YannCebron

ijs.tree

@@ -415,7 +415,6 @@
         <toc-element topic="api_changes_list_2022.md" toc-title="2022.*"/>
         <toc-element topic="api_changes_list_2021.md" toc-title="2021.*"/>
         <toc-element topic="api_changes_list_2020.md" toc-title="2020.*"/>
-        <toc-element topic="api_changes_list_2019.md" toc-title="2019.*"/>
       </toc-element>
     </toc-element>
     <toc-element topic="api_notable.md" toc-title="Notable API Changes"

reference_guide/api_changes_list.md

@@ -86,7 +86,6 @@ The following pages list the breaking changes in IDE and plugin releases with re
 * [Changes in 2022.*](api_changes_list_2022.md)
 * [Changes in 2021.*](api_changes_list_2021.md)
 * [Changes in 2020.*](api_changes_list_2020.md)
-* [Changes in 2019.*](api_changes_list_2019.md)
 
 ## Bundled Library Updates