[gcc r11-761] libstdc++: Remove stray change from previous commit

[Gerald Pfeifer]

https://gcc.gnu.org/g:0feb33215261ba42236105ea67b99455ed5a1b35

commit r11-761-g0feb33215261ba42236105ea67b99455ed5a1b35
Author: Gerald Pfeifer <gerald@pfeifer.com>
Date:   Mon Jun 1 02:10:24 2020 +0200

    libstdc++: Remove stray change from previous commit
    
    There is a stray change (introducing a bogus line at the top) that
    came via 2babbb6760c43bcd803a5e168ef5ecb0be8a5121; remove that again.
    
            * doc/xml/manual/policy_data_structures_biblio.xml: Remove
            stray change.

Diff:
---
 libstdc++-v3/doc/xml/manual/policy_data_structures_biblio.xml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/libstdc++-v3/doc/xml/manual/policy_data_structures_biblio.xml b/libstdc++-v3/doc/xml/manual/policy_data_structures_biblio.xml
index 39bd2e70b7f..7c563fec40a 100644
--- a/libstdc++-v3/doc/xml/manual/policy_data_structures_biblio.xml
+++ b/libstdc++-v3/doc/xml/manual/policy_data_structures_biblio.xml
@@ -1,4 +1,3 @@
-B
 <!-- Policy Based Data Structures: Biblio -->
 <bibliography xmlns="http://docbook.org/ns/docbook" version="5.0"
 	      xml:id="pbds.biblio" xreflabel="Bibliography">