[gcc r13-4871] libstdc++: Remove problematic static_assert from src/c++20/tzdb.cc

[Jonathan Wakely]

https://gcc.gnu.org/g:db3c5831f80e674b9ee77c1e9ca8364a72ca5758

commit r13-4871-gdb3c5831f80e674b9ee77c1e9ca8364a72ca5758
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Dec 23 09:19:38 2022 +0000

    libstdc++: Remove problematic static_assert from src/c++20/tzdb.cc
    
    This assertion fails for cris-elf where sizeof(datetime) is only 7, due
    to lower alignment requirements. The assertion was used while I was
    writing the code to check that the objects were as compact as I wanted,
    but it doesn't need to be kept now.
    
    libstdc++-v3/ChangeLog:
    
            * src/c++20/tzdb.cc: Remove static_assert.

Diff:
---
 libstdc++-v3/src/c++20/tzdb.cc | 1 -
 1 file changed, 1 deletion(-)

diff --git a/libstdc++-v3/src/c++20/tzdb.cc b/libstdc++-v3/src/c++20/tzdb.cc
index a0bb03173a9..a02bcd4aec7 100644
--- a/libstdc++-v3/src/c++20/tzdb.cc
+++ b/libstdc++-v3/src/c++20/tzdb.cc
@@ -448,7 +448,6 @@ namespace std::chrono
       // This allows on_day to reuse padding of at_time.
       // This keeps the size to 8 bytes and the alignment to 4 bytes.
       struct datetime : at_time { on_day day; };
-      static_assert(sizeof(datetime) == 8 && alignof(datetime) == 4);
 
       // TODO combining name+letters into a single string (like in ZoneInfo)
       // would save sizeof(string) and make Rule fit in a single cacheline.