Remove ubuntu images for agent

Author: lucian-tosa

Makefile

@@ -150,7 +150,6 @@ e2e-image: ## Build and push e2e test image
 python pipeline.py --image-name e2e
 
 agent-image: ## Build and push agent image
-python pipeline.py --image-name agent-ubuntu
 python pipeline.py --image-name agent-ubi
 
 readiness-probe-image: ## Build and push readiness probe image