Remove important references to v2019 from website

The v2019 release has reached the end of its support period. It also marks the
point at which we are now fully into the current Apertis release cadence, with
a development, stable and old stable release being supported.

Remove the pointer to the "old old stable" from the main page, the data from
the releases file and the reference to the supported version of Virtual Box.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

content/_index.md

@@ -63,7 +63,6 @@ For more information, see [Release flow and product lines]( {{< ref "release-flo
 
 * Current stable release: [v2021.0]( {{< ref "/release/v2021.0/releasenotes.md" >}} )
 * Current old stable release: [v2020.4]( {{< ref "/release/v2020.4/releasenotes.md" >}} )
-* Current old old stable release: [v2019.7]( {{< ref "/release/v2019.7/releasenotes.md" >}} )
 * Current development release: [v2022dev1]( {{< ref "/release/v2022dev1/releasenotes.md" >}} )
 * [Further releases]( {{< ref "releases.md" >}} )
 

content/guides/virtualbox.md

@@ -71,7 +71,6 @@ The following table contains the supported version of VirtualBox and VirtualBox
 
 | Apertis release | VirtualBox version | VirtualBox Guest Additions version |
 | ------ | ------ | ----- |
-| v2019 | [6.1.12 r139181 (Qt5.6.2)](https://download.virtualbox.org/virtualbox/6.1.12/VirtualBox-6.1.12-139181-Win.exe) | [6.1.12](https://download.virtualbox.org/virtualbox/6.1.12/VBoxGuestAdditions_6.1.12.iso) |
 | v2020 | [6.1.12 r139181 (Qt5.6.2)](https://download.virtualbox.org/virtualbox/6.1.12/VirtualBox-6.1.12-139181-Win.exe) | [6.1.12](https://download.virtualbox.org/virtualbox/6.1.12/VBoxGuestAdditions_6.1.12.iso) |
 | v2021 | [6.1.12 r139181 (Qt5.6.2)](https://download.virtualbox.org/virtualbox/6.1.12/VirtualBox-6.1.12-139181-Win.exe) | [6.1.12](https://download.virtualbox.org/virtualbox/6.1.12/VBoxGuestAdditions_6.1.12.iso) |
 | v2022 | [6.1.12 r139181 (Qt5.6.2)](https://download.virtualbox.org/virtualbox/6.1.12/VirtualBox-6.1.12-139181-Win.exe) | [6.1.12](https://download.virtualbox.org/virtualbox/6.1.12/VBoxGuestAdditions_6.1.12.iso) |

data/releases.toml

@@ -9,7 +9,3 @@ revision = "0"
 [Old-stable]
 version = "v2020"
 revision = "4"
-
-[Old-old-stable]
-version = "v2019"
-revision = "7"