fix(lint): remove unused DefaultAzureCredential import and fix indentation

- F401: drop unused sync DefaultAzureCredential import in 3 credential util files (sync flow now raises RuntimeError; AsyncDefaultAzureCredential is still used).

- W293/E122: fix blank-line whitespace and continuation-line indentation in ContentProcessorWorkflow/src/utils/credential_util.py.

Author: Prachig-Microsoft

src/ContentProcessor/src/libs/utils/azure_credential_utils.py

@@ -19,7 +19,6 @@
 from azure.identity import (
     AzureCliCredential,
     AzureDeveloperCliCredential,
-    DefaultAzureCredential,
     ManagedIdentityCredential,
 )
 from azure.identity import (

src/ContentProcessor/src/libs/utils/credential_util.py

@@ -19,7 +19,6 @@
 from azure.identity import (
     AzureCliCredential,
     AzureDeveloperCliCredential,
-    DefaultAzureCredential,
     ManagedIdentityCredential,
 )
 from azure.identity import (

src/ContentProcessorWorkflow/src/utils/credential_util.py

@@ -19,7 +19,6 @@
 from azure.identity import (
     AzureCliCredential,
     AzureDeveloperCliCredential,
-    DefaultAzureCredential,
     ManagedIdentityCredential,
 )
 from azure.identity import (
@@ -126,11 +125,11 @@ def get_azure_credential():
     logging.info(
         "[AUTH] All CLI credentials failed - falling back to DefaultAzureCredential"
     )
-    
+
     raise RuntimeError(
-    "No Azure authentication available. "
-    "Use Managed Identity in Azure or run "
-    "'az login' / 'azd auth login' locally."
+        "No Azure authentication available. "
+        "Use Managed Identity in Azure or run "
+        "'az login' / 'azd auth login' locally."
     )