Clean up so test_ts_plot_with_tz doesn't fail

Author: Steffen Rehberg, Rebecca N. Palmer <[email protected]>
Bug: pandas-dev/pandas#35080
Forwarded: no


Gbp-Pq: Name 35080_plot_tests.patch

Author: Debian Science Team

pandas/tests/plotting/test_converter.py

@@ -132,6 +132,7 @@ def test_option_no_warning(self):
         # Test without registering first, no warning
         with ctx:
             ax.plot(s.index, s.values)
+        plt.clf()
 
         # Now test with registering
         register_matplotlib_converters()