Remove install test (#31)

Beman install test removed upstream.

<!--
Please take note of the following when contributing:
- Our code of conduct:
https://github.com/bemanproject/beman/blob/main/docs/code_of_conduct.md
- The Beman Standard:
https://github.com/bemanproject/beman/blob/main/docs/beman_standard.md
-->

Author: steve-downey

.github/workflows/ci_tests.yml

@@ -134,12 +134,6 @@ jobs:
           ]
         }
 
-  install-test:
-    uses: bemanproject/infra-workflows/.github/workflows/reusable-beman-install-test.yml@1.5.0
-    with:
-      image: ghcr.io/bemanproject/infra-containers-gcc:latest
-      cxx_standard: 26
-
   create-issue-when-fault:
     needs: [preset-test, build-and-test]
     if: failure() && github.event_name == 'schedule'