python 3.6 is deprecated, removing testing it into centos7

.gitlab-ci.yml

@@ -3,26 +3,6 @@ stages:
   - test
   - deploy
 
-test-centos7:
-  needs: []
-  image: centos:centos7
-  stage: test
-  script:
-  - yum install -y epel-release wget
-  - yum install -y https://repo.ius.io/ius-release-el7.rpm
-  - yum update -y
-  - yum provides python3.6
-  - yum install -y python36u python36u-libs python36u-devel python36u-pip
-  - yum install -y blas-devel lapack-devel
-  - pip3.6 install --user pip
-  - python3.6 -m pip install virtualenv
-  - virtualenv -p python3.6 venv
-  - . venv/bin/activate
-  - yum install -y git
-  - pip3.6 install -r requirements.txt
-  - yum install -y httpd httpd-devel gcc
-  - pip3.6 install mod_wsgi
-  - python3.6 setup.py test
 
 .test-python:
   needs: []