Stop allowing CI to fail.

...now that we are disabling the flaky/failing tests anyway, there is no
need for this.

.github/workflows/build.yml

@@ -73,9 +73,7 @@ jobs:
       - name: test
         run: |
           set -o pipefail
-          # Currently these tests never pass.
-          # TODO: When they are fixed, remove the || true
-          (make test |& tee testlog.txt; echo "Result: $?") || true
+          (make test |& tee testlog.txt; echo "Result: $?")
       - name: upload test log
         if: always()
         uses: actions/upload-artifact@v2