use default port for in-built mysql

Author: David Erb

.github/workflows/code.yml

@@ -88,7 +88,7 @@ jobs:
       - name: Run tests
         env:
           MYSQL_HOST: 127.0.0.1
-          MYSQL_PORT: ${{ job.services.mysql_service.ports[3306] }}
+          # MYSQL_PORT: ${{ job.services.mysql_service.ports[3306] }}
         run: |
           sudo apt install environment-modules
           export MODULESHOME=/usr/share/modules