CI: remove unfinished CentOS/RHEL jobs

.gitlab-ci.yml

@@ -5,25 +5,6 @@ stages:
   - build
 
 
-# CentOS/RHEL
-
-centos8:build:
-  extends: .make_in_docker
-  stage: build
-  variables:
-    CI_DISTRO_TARGET: "centos8"
-  rules:
-    - if: '$CI_COMMIT_TAG  !~ /^Release_[0-9]+\.[0-9]+\.[0-9]+$/'
-
-centos8:tagged-build:
-  extends: .make_in_docker
-  stage: build
-  variables:
-    CI_DISTRO_TARGET: "centos8"
-    TAGGED_BUILD: "true"
-  rules:
-    - if: '$CI_COMMIT_TAG  =~ /^Release_[0-9]+\.[0-9]+\.[0-9]+$/'
-
 # Debian
 
 debian10:build: