diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index a39344d..61cb76d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -30,7 +30,7 @@ repos:
     -   id: mixed-line-ending
     -   id: trailing-whitespace
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.15.15
+  rev: v0.15.20
   hooks:
     # Run the linter.
     - id: ruff-check
diff --git a/releso/util/visualization.py b/releso/util/visualization.py
index 21cbf58..5638801 100644
--- a/releso/util/visualization.py
+++ b/releso/util/visualization.py
@@ -617,16 +617,6 @@ def plot_step_log(
 
     # Create the interactive visualization
 
-    # Choose which obs dimensions to show in bottom subplot
-    design_var_names = df.columns[
-        df.columns.str.contains("design_variable_")
-    ].tolist()
-
-    # Choose which obs dimensions to show in top subplot
-    objective_names = df.columns[
-        df.columns.str.contains("objective_")
-    ].tolist()
-
     # Get all unique episodes
     episodes = df["episodes"].unique()