Merge pull request #87 from opensciencegrid/SOFTWARE-5924-remove-el7-build

SOFTWARE-5924: Remove EL7 from github workflows build matrix

Author: matyasselmeci

.github/workflows/build-container.yml

@@ -25,8 +25,6 @@ jobs:
       fail-fast: False
       matrix:
         base:
-          - image: 'docker.io/centos:centos7'
-            tag_str: 'el7'
           - image: 'docker.io/library/almalinux:8'
             tag_str: 'el8'
           - image: 'quay.io/almalinux/almalinux:9'
@@ -35,12 +33,6 @@ jobs:
             tag_str: 'cuda_11_8_0'
         repo: ['development', 'testing', 'release']
         series: ['3.6', '23']
-        # Exclude EL7 for OSG 23 builds
-        exclude:
-          # exclude/include for nested dict items have to use the dict form
-          # https://github.com/actions/runner/issues/1512
-          - base: {image: 'docker.io/centos:centos7', tag_str: 'el7'}
-            series: '23'
     needs: make-date-tag
     steps:
     - name: checkout docker-software-base