lifecycle: drop now past-EOL 22.x

Author: fanquake

_includes/posts/maintenance-table.md

@@ -1,4 +1,3 @@
-| 22.0 | 2021-09-13 | 2022-11-24  | 2023-04-01 |
 | 23.0 | 2022-04-25 | 2023-05-18  | 2023-12-01 |
 | 24.0 | 2022-11-24 | after v26.0 | TBA        |
 | 25.0 | 2023-05-18 | after v27.0 | TBA        |