[Nova] Disable CircleCI Linux Unittests

Author: osalpekar

.circleci/config.yml

@@ -246,7 +246,7 @@ def indent(indentation, data_list):
 
 def unittest_workflows(indentation=6):
     jobs = []
-    for os_type in ["linux", "windows", "macos"]:
+    for os_type in ["windows", "macos"]:
         for device_type in ["cpu", "gpu"]:
             if os_type == "macos" and device_type == "gpu":
                 continue