Deprecation of Ubuntu 18.04

because it's EOL

Signed-off-by: Artem Sidorenko <artem.sidorenko@telekom.de>

.github/workflows/test.yml

@@ -56,7 +56,6 @@ jobs:
           - fedora-37
           - fedora-38
 #          - opensuse-42 # something is broken here
-          - ubuntu-18-04
           - ubuntu-20-04
     steps:
       - uses: actions/checkout@v3
@@ -93,7 +92,6 @@ jobs:
           - default-almalinux-9
           - default-rockylinux-8
           - default-rockylinux-9
-          - default-ubuntu-18-04
           - default-ubuntu-20-04
           - default-debian-10
           - default-debian-11

.kitchen.do.yml

@@ -47,12 +47,6 @@ platforms:
   lifecycle:
     post_create:
       - remote: sleep 10; while pgrep apt-get >/dev/null; do echo "Waiting for apt-get..."; sleep 5; done # let the installation of DO droplet-agent to finish and unlock dpkg
-- name: ubuntu-18-04
-  driver_config:
-    image: ubuntu-18-04-x64
-  lifecycle:
-    post_create:
-      - remote: sleep 10; while pgrep apt-get >/dev/null; do echo "Waiting for apt-get..."; sleep 5; done # let the installation of DO droplet-agent to finish and unlock dpkg
 - name: ubuntu-20-04
   driver_config:
     image: ubuntu-20-04-x64

.kitchen.dokken.yml

@@ -92,12 +92,6 @@ platforms:
   driver:
     image: dokken/opensuse-leap
     pid_one_command: /bin/systemd
-- name: ubuntu-18-04
-  driver:
-    image: dokken/ubuntu-18.04
-    pid_one_command: /bin/systemd
-    intermediate_instructions:
-      - RUN /usr/bin/apt-get update
 - name: ubuntu-20-04
   driver:
     image: dokken/ubuntu-20.04

.kitchen.yml

@@ -3,9 +3,6 @@ driver:
   name: vagrant
 
 platforms:
-- name: ubuntu-18-04
-  driver_config:
-    box: bento/ubuntu-18.04
 - name: ubuntu-20-04
   driver_config:
     box: bento/ubuntu-20.04