Remove ubi8/udi8 source code

Signed-off-by: dkwon17 <[email protected]>

Author: dkwon17

.github/workflows/empty-worksapce-smoke-test-on-minikube-ubi9.yaml

@@ -17,8 +17,6 @@ on:
       - '**/*.md'
       - .devfile.yaml
       - LICENSE
-      - 'base/ubi8/**'
-      - 'universal/ubi8/**'
 
 env:
    USERSTORY: CloneGitRepoAPI