Remove "Error" string from response output

When an API call returns an error, it is printed using abort() which already inform the user that the following content is an error.

Signed-off-by: Jérôme Jutteau <[email protected]>

osc_sdk/sdk.py

@@ -55,7 +55,7 @@ def __init__(self, http_response):
 
     def __str__(self):
         return (
-            f'Error --> status = {self.status_code}, '
+            f'status = {self.status_code}, '
             f'code = {self.error_code}, '
             f'{"code_type = " if self.code_type is not None else ""}'
             f'{self.code_type + ", " if self.code_type is not None else ""}'