Get out of ubuntu 22 image building

EF provided 24.04 is used in smoke tests.

Author: akurtakov

.github/dependabot.yml

@@ -42,11 +42,6 @@ updates:
     schedule:
       interval: daily
 
-  - package-ecosystem: docker
-    directory: /cje-production/dockerfiles/ubuntu-gtk3-metacity/22.04-gtk3
-    schedule:
-      interval: daily
-
   - package-ecosystem: maven
     directory: /
     schedule:

JenkinsJobs/Builds/DockerImagesBuild.jenkinsfile

@@ -29,7 +29,6 @@ pipeline {
 						parallel(
 							'centos9-gtk4': { buildAndPushImage('centos-gtk4-mutter/9-gtk4', 'eclipse/platformreleng-centos-gtk4-mutter:9') },
 							'centos9-gtk4-swt': { buildAndPushImage('centos-gtk4-mutter/9-swtBuild', 'eclipse/platformreleng-centos-swt-build:9') },
-							'ubuntu-gtk3': { buildAndPushImage('ubuntu-gtk3-metacity/22.04-gtk3', 'eclipse/platformreleng-ubuntu-gtk3-metacity:22.04') },
 							'opensuse-gtk3': { buildAndPushImage('opensuse-gtk3-metacity/15-gtk3', 'eclipse/platformreleng-opensuse-gtk3-metacity:15') },
 						failFast: false)
 					}