Remove ubuntu 20.04 tests

Signed-off-by: Evan Lezar <elezar@nvidia.com>

.common-ci.yml

@@ -262,10 +262,7 @@ release:staging-ubuntu20.04:
     - .release:staging
     - .dist-ubuntu20.04
   needs:
-    - test-toolkit-ubuntu20.04
-    - test-containerd-ubuntu20.04
-    - test-crio-ubuntu20.04
-    - test-docker-ubuntu20.04
+    - image-ubuntu20.04
 
 release:staging-packaging:
   extends:

.gitlab-ci.yml

@@ -371,31 +371,3 @@ test-docker-ubuntu18.04:
   needs:
     - image-ubuntu18.04
 
-test-toolkit-ubuntu20.04:
-  extends:
-    - .test:toolkit
-    - .dist-ubuntu20.04
-  needs:
-    - image-ubuntu20.04
-
-test-containerd-ubuntu20.04:
-  extends:
-    - .test:containerd
-    - .dist-ubuntu20.04
-  needs:
-    - image-ubuntu20.04
-
-test-crio-ubuntu20.04:
-  extends:
-    - .test:crio
-    - .dist-ubuntu20.04
-  needs:
-    - image-ubuntu20.04
-
-test-docker-ubuntu20.04:
-  extends:
-    - .test:docker
-    - .dist-ubuntu20.04
-  needs:
-    - image-ubuntu20.04
-