rebase: remove instascale from new testcase

Author: dgrove-oss

tests/unit_test.py

@@ -1987,7 +1987,6 @@ def test_get_cluster_no_mcad(mocker):
     assert cluster_config.min_cpus == 1 and cluster_config.max_cpus == 1
     assert cluster_config.min_memory == "2G" and cluster_config.max_memory == "2G"
     assert cluster_config.num_gpus == 0
-    assert cluster_config.instascale
     assert (
         cluster_config.image
         == "ghcr.io/foundation-model-stack/base:ray2.1.0-py38-gpu-pytorch1.12.0cu116-20221213-193103"