fix pylint Unnecessary "else" after "return"

Author: Namrata Madan

src/sagemaker/lambda_helper.py

@@ -171,8 +171,7 @@ def upsert(self):
         except ValueError as error:
             if "ResourceConflictException" in str(error):
                 return self.update()
-            else:
-                raise
+            raise
 
     def invoke(self):
         """Method to invoke a lambda function.

src/sagemaker/workflow/lambda_step.py

@@ -157,5 +157,4 @@ def _get_function_arn(self):
         if self.lambda_func.function_arn is None:
             response = self.lambda_func.upsert()
             return response["FunctionArn"]
-        else:
-            return self.lambda_func.function_arn
+        return self.lambda_func.function_arn