remove custom agent v3 make target

Author: pdabelf5

Makefile

@@ -160,12 +160,6 @@ alpine-image-nap-v5-plus-fips: build ## Create Docker image for Ingress Controll
 debian-image-plus: build ## Create Docker image for Ingress Controller (Debian with NGINX Plus)
 	$(DOCKER_CMD) $(PLUS_ARGS) --build-arg BUILD_OS=debian-plus
 
-.PHONY: debian-image-agentv3-plus
-debian-image-agentv3-plus: build ## Create Docker image for Ingress Controller (Debian with NGINX Plus, Agent v3 and NGINX App Protect WAFv5)
-	$(DOCKER_CMD) $(PLUS_ARGS) \
-	--build-arg BUILD_OS=agent-v3-plus \
-	--build-arg NGINX_AGENT=$(NGINX_AGENT)
-
 .PHONY: debian-image-nap-plus
 debian-image-nap-plus: build ## Create Docker image for Ingress Controller (Debian with NGINX Plus and NGINX App Protect WAF)
 	$(DOCKER_CMD) $(PLUS_ARGS) --build-arg BUILD_OS=debian-plus-nap --build-arg NAP_MODULES=waf