fix: edit Dockerfile file overwrite

Author: andhreljaKern

pi/edit_dockerfile.sh

@@ -24,5 +24,4 @@ PI_EXISTING_IMAGE="${DOCKER_REGISTRY}/${PARENT_IMAGE_NAME}:${PI_EXISTING_TAG}"
 PI_NEW_IMAGE="${DOCKER_REGISTRY}/${PARENT_IMAGE_NAME}:${RELEASE_TAG}-${PARENT_IMAGE_TYPE}"
 
 sed -e 's|'${PI_EXISTING_IMAGE}'|'${PI_NEW_IMAGE}'|g' ${DOCKERFILE} > ${DOCKERFILE}.tmp && mv ${DOCKERFILE}.tmp ${DOCKERFILE}
-echo ${DOCKER_CONTENT} > ${DOCKERFILE}
 echo "::notice::Dockerfile updated with new image: ${PI_NEW_IMAGE}"