cleanup: remove stray debug print in Dynamips node creation

The print(node_data.chassis, platform in DEFAULT_CHASSIS) at
dynamips_nodes.py:67 (added in 8ad7b3f6, 2022) emitted "None False"
to stdout on every Dynamips router creation. Pure debug leftover;
the very next line tests the same condition.

gns3server/api/routes/compute/dynamips_nodes.py

@@ -64,7 +64,6 @@ async def create_router(project_id: UUID, node_data: schemas.DynamipsCreate) ->
 
     dynamips_manager = Dynamips.instance()
     platform = node_data.platform
-    print(node_data.chassis, platform in DEFAULT_CHASSIS)
     if not node_data.chassis and platform in DEFAULT_CHASSIS:
         chassis = DEFAULT_CHASSIS[platform]
     else: