run-tests: unset CHGDEBUG
With CHGDEBUG, chg outputs much more stuff and the test could fail running
with --chg. So unset the environment variable.
--- a/tests/run-tests.py Fri Jan 06 14:35:22 2017 +0100
+++ b/tests/run-tests.py Fri Jan 06 16:19:41 2017 +0000
@@ -849,7 +849,7 @@
env['TERM'] = 'xterm'
for k in ('HG HGPROF CDPATH GREP_OPTIONS http_proxy no_proxy ' +
- 'NO_PROXY').split():
+ 'NO_PROXY CHGDEBUG').split():
if k in env:
del env[k]