fix flake moan (NO_JIRA)

Author: jasonccole

api_paper_2024/example_5/visualiser.py

@@ -17,7 +17,6 @@
 
 try:
     from plotly import graph_objects as go
-    from plotly.subplots import make_subplots
 
 except ModuleNotFoundError:
     warnings.warn("Plotly could not be found, please install plotly using `conda install plotly`")