Summary: Strip environment variables in lxqt-sudo Test Plan: 1. Test first with lxqt-sudo from repo: lxqt-sudo env 2> env.txt 2. Install this version 3. Run lxqt-sudo env 2> env2.txt 4. Compare env.txt with env2.txt: diff -y env.txt env2.txt 5. Both files should differ in most environment variables, such as HOME Reviewers: tsimonq2, wxl Reviewed By: tsimonq2 Differential Revision: https://phab.lubuntu.me/D44