[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

tests/conftest.py

@@ -960,7 +960,7 @@ def _wait_graph_page_ready(host, selenium):
             try:
                 selenium.refresh()
                 break
-            except timeout_exceptions as e:
+            except timeout_exceptions:
                 if n == tries - 1:
                     raise