[gcc r11-8040] libstdc++: Remove bogus ChangeLog entry

[Jonathan Wakely]

https://gcc.gnu.org/g:e34f88c955b417ea0ce0d5892cc4f83720b818d5

commit r11-8040-ge34f88c955b417ea0ce0d5892cc4f83720b818d5
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Apr 8 12:18:01 2021 +0100

    libstdc++: Remove bogus ChangeLog entry

Diff:
---
 libstdc++-v3/ChangeLog | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 339a72bf079..00140c17b9d 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -34,10 +34,6 @@
 	* include/ext/pb_ds/priority_queue.hpp: Add blank line before group
 	open.
 
-2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
-
-	* include/tr1/regex:
-
 2021-04-06  Jonathan Wakely  <jwakely@redhat.com>
 
 	* include/bits/atomic_base.h: Fix doxygen group close.