minute changes

manimlib/config.py

@@ -257,7 +257,7 @@ def update_camera_config(config: Dict, args: Namespace):
     if args.color:
         try:
             camera_config.background_color = colour.Color(args.color)
-        except Exception:
+        except Exception as err:
             log.error("Please use a valid color")
             log.error(err)
             sys.exit(2)

manimlib/mobject/vector_field.py

@@ -386,7 +386,6 @@ class StreamLines(VGroup):
 
     def draw_lines(self) -> None:
         lines = []
-        origin = self.coordinate_system.get_origin()
 
         # Todo, it feels like coordinate system should just have
         # the ODE solver built into it, no?