fix(publisher): remove unnecessary BUILD_IMAGE variable from Makefile

Author: Karlo Nicholas Soriano

publisher/Makefile

@@ -9,7 +9,6 @@ GO_PACKAGES_REPO_PATH = $(addprefix $(repo_path)/,$(GO_PACKAGES))
 
 COMPONENT = $(notdir $(repo_path))
 DOCKER_IMAGE := $(IMAGE_PREFIX)$(COMPONENT)
-BUILD_IMAGE := $(DOCKER_IMAGE)-build
 RELEASE_IMAGE := $(DOCKER_IMAGE):$(BUILD_TAG)
 REMOTE_IMAGE := $(REGISTRY)/$(RELEASE_IMAGE)
 BINARY_DEST_DIR = image/bin