DOC: in ReST, a sublabel defines it's parent. latex complains of dupe

y-p · y-p · commit 690e0697cc08 · 2014-01-17T15:11:05.000+02:00
diff --git a/doc/source/merging.rst b/doc/source/merging.rst
@@ -580,8 +580,6 @@ them together on their indexes. The same is true for ``Panel.join``.
    df1
    df1.join([df2, df3])
 
-.. _merging.combine_first:
-
 .. _merging.combine_first.update:
 
 Merging together values within Series or DataFrame columns
