Don't install GCC in MSYS2.

Author: Paebbels

.github/workflows/CompletePipeline.yml

@@ -237,7 +237,6 @@ jobs:
     with:
       jobs: ${{ needs.UnitTestingParams.outputs.python_jobs }}
 # TODO: shouldn't this be configured by a parameter? Same as directories
-      pacboy: "gcc:p"
       unittest_report_xml:      ${{ needs.ConfigParams.outputs.unittest_report_xml }}
       coverage_report_xml:      ${{ needs.ConfigParams.outputs.coverage_report_xml }}
       coverage_report_json:     ${{ needs.ConfigParams.outputs.coverage_report_json }}