Revert "TST: Log scale on bar chart hides bars GH3247" mpl 1.2.1 regression

This reverts commit 682b39e.

Author: y-p

pandas/tests/test_graphics.py

@@ -395,11 +395,6 @@ def test_bar_center(self):
         ax = df.plot(kind='bar', grid=True)
         self.assertEqual(ax.xaxis.get_ticklocs()[0],
                          ax.patches[0].get_x() + ax.patches[0].get_width())
-    @slow
-    def test_bar_log(self):
-        df = DataFrame({'A': [3] * 5, 'B': range(5)}, index=range(5))
-        ax = df.plot(kind='bar', grid=True,log=True)
-        self.assertEqual(ax.yaxis.get_ticklocs()[0],0.1)
 
     @slow
     def test_boxplot(self):