Update azure.py

Author: diogoazevedo15

llmstudio/engine/providers/azure.py

@@ -61,7 +61,6 @@ def __init__(self, config):
         self.is_llama = False
         self.has_tools = False
         self.has_functions = False
-        self.model_instace = None
 
     def validate_request(self, request: AzureRequest):
         return AzureRequest(**request)