SIENTIAPDE-1174

Remove unused metrics import from core_scouter.py to streamline code and improve clarity.

scouter/workflow/sub_workflows/core_scouter.py

@@ -1,7 +1,5 @@
 from temporalio import workflow
 
-from scouter import metrics
-
 with workflow.unsafe.imports_passed_through():
     from scouter.activities.activities import Activities
     from typing import Any