[regex] Remove bogus indexlibrary entry

tkoeppe · tkoeppe · commit bd00cfb2b9f5 · 2016-07-11T20:36:22.000+01:00
diff --git a/source/regex.tex b/source/regex.tex
@@ -3035,7 +3035,6 @@
 \end{itemdescr}
 
 \rSec2[re.results.all]{\tcode{match_results} allocator}%
-\indexlibrary{allocator}
 
 \indexlibrary{\idxcode{get_allocator}!\idxcode{match_results}}%
 \indexlibrary{\idxcode{match_results}!\idxcode{get_allocator}}%
