Increase upgrades-status-notify verbosity

Print errors on stderr. yum_output variable isn't used anywhere, so
not capturing stderr wont be a problem either.

package-managers/upgrades-installed-check

@@ -15,7 +15,7 @@ if [ -e /etc/system-release ]; then
         yum=yum
     fi
     # shellcheck disable=SC2034
-    yum_output="$($yum -yq check-update 2>&1)"
+    yum_output="$($yum -yq check-update)"
     exit_code="$?"
     [ "$exit_code" -eq 100 ] && echo "false" && exit 0
     [ "$exit_code" -eq 0 ] && echo "true"

package-managers/upgrades-status-notify

@@ -2,7 +2,7 @@
 
 set -e
 
-upgrades_installed="$(/usr/lib/qubes/upgrades-installed-check 2>&1)"
+upgrades_installed="$(/usr/lib/qubes/upgrades-installed-check)"
 
 if [ "$upgrades_installed" = "true" ]; then
     /usr/lib/qubes/qrexec-client-vm dom0 qubes.NotifyUpdates /bin/sh -c 'echo 0'