Update quartus_backend.py

Author: jmduarte

hls4ml/backends/quartus/quartus_backend.py

@@ -127,7 +127,7 @@ def get_writer_flow(self):
     def create_initial_config(self, part='Arria10', clock_period=5, io_type='io_parallel'):
         config = {}
 
-        config['Part'] = part if part is not None else 'Arria10'
+        config['Part'] = part
         config['ClockPeriod'] = clock_period
         config['IOType'] = io_type
         config['HLSConfig'] = {}