master fad87d84df 1/5: Don't mention test failures on Ubuntu 16.04 in PROBLEMS

[Stefan Kangas]

branch: master
commit fad87d84df8eace5f7c0df12c6e657950ec638cb
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Don't mention test failures on Ubuntu 16.04 in PROBLEMS
    
    Ubuntu 16.04 LTS reached end of life on April 30th, 2021.
    Furthermore, test failures don't seem significant enough to warrant an
    entry.  It's rather cosmetic.
    * etc/PROBLEMS: Delete entry on test failures on Ubuntu 16.04.
---
 etc/PROBLEMS | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index 781a54c06b..c72322811b 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -3546,15 +3546,6 @@ as a macro.  If the definition (in both unex*.c and 
malloc.c) is wrong,
 it can cause problems like this.  You might be able to find the correct
 value in the man page for a.out(5).
 
-* 'make check' failures
-
-** emacs-module-tests fail on Ubuntu 16.04
-
-This is due to a bug in GCC that was fixed in 2015; see
-<https://lists.gnu.org/r/emacs-devel/2018-09/msg00548.html>.
-You can work around the problem by using a later version of GCC or of
-Ubuntu, or by configuring without modules.
-
 * Problems on legacy systems
 
 This section covers bugs reported on very old hardware or software.