remove REPORT_EXIT_STATUS=no

Author: SakiTakamachi

.github/actions/test-libmysqlclient/action.yml

@@ -14,7 +14,6 @@ runs:
         export PDO_MYSQL_TEST_HOST=127.0.0.1
         export PDO_MYSQL_TEST_USER=root
         export PDO_MYSQL_TEST_PASS=root
-        export REPORT_EXIT_STATUS=no
         sapi/cli/php run-tests.php -P -q \
           -g FAIL,BORK,LEAK,XLEAK \
           --no-progress --offline --show-diff --show-slow 1000 --set-timeout 120 \