test-https: drop two spurious --traceback flags

These make test failures scarier than they are.

tests/test-https.t

@@ -230,7 +230,7 b' cacert configured in local repo'
   $ cp copy-pull/.hg/hgrc copy-pull/.hg/hgrc.bu
   $ echo "[web]" >> copy-pull/.hg/hgrc
   $ echo "cacerts=$CERTSDIR/pub.pem" >> copy-pull/.hg/hgrc
-  $ hg -R copy-pull pull --traceback
+  $ hg -R copy-pull pull
   pulling from https://localhost:$HGPORT/
   warning: connecting to localhost using legacy security technology (TLS 1.0); see https://mercurial-scm.org/wiki/SecureConnections for more info (?)
   searching for changes
@@ -554,7 +554,7 b" from the shell. So don't kill it."
 
 Test unvalidated https through proxy
 
-  $ http_proxy=http://localhost:$HGPORT1/ hg -R copy-pull pull --insecure --traceback
+  $ http_proxy=http://localhost:$HGPORT1/ hg -R copy-pull pull --insecure
   pulling from https://localhost:$HGPORT/
   warning: connecting to localhost using legacy security technology (TLS 1.0); see https://mercurial-scm.org/wiki/SecureConnections for more info (?)
   warning: connection security to localhost is disabled per current settings; communication is susceptible to eavesdropping and tampering