Remove obsolete buildbot reference in compat.sh

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/tests/compat.sh b/tests/compat.sh
index 3626642..1244560 100755
--- a/tests/compat.sh
+++ b/tests/compat.sh
@@ -1259,7 +1259,7 @@
             cp $CLI_OUT c-cli-${TESTS}.log
             echo "  ! outputs saved to c-srv-${TESTS}.log, c-cli-${TESTS}.log"
 
-            if [ "X${USER:-}" = Xbuildbot -o "X${LOGNAME:-}" = Xbuildbot -o "${LOG_FAILURE_ON_STDOUT:-0}" != 0 ]; then
+            if [ "${LOG_FAILURE_ON_STDOUT:-0}" != 0 ]; then
                 echo "  ! server output:"
                 cat c-srv-${TESTS}.log
                 echo "  ! ==================================================="