Revert "drm_hwcomposer: CI: publish docker image to local container registry"

This reverts commit a999307120be58ccc7493196f5e641822e11d518.
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 95df224..cbcc664 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,6 @@
 
 variables:
   DEBIAN_FRONTEND: noninteractive
-  DOCKER_IMAGE_TAG: $CI_REGISTRY_IMAGE:latest
 
 before_script:
   - apt-get --quiet update --yes >/dev/null
@@ -16,26 +15,10 @@
   - apt-get --quiet install --yes python3-mako python3-jinja2 python3-ply python3-yaml >/dev/null
 
 stages:
-  - build-container
   - build
   - tidy
   - style
 
-build-container:
-  stage: build-container
-  image: docker:27.0.3
-  services:
-    - docker:27.0.3-dind
-  variables:
-    DOCKER_TLS_CERTDIR: ""
-  before_script:
-    - echo "$CI_JOB_TOKEN" | docker login $CI_REGISTRY -u $CI_REGISTRY_USER --password-stdin
-  script:
-    - docker build -t $DOCKER_IMAGE_TAG -f .ci/Dockerfile .
-    - docker push $DOCKER_IMAGE_TAG
-  after_script:
-    - docker logout
-
 build:
   stage: build
   script: