Remove terminal colors in run-test-in-systemd

Remove setting terminal properties to show colored text.

This seems to break some tests in LAVA, and it is a feature not really
needed for LAVA test, so just remove it.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

common/run-test-in-systemd

@@ -323,15 +323,11 @@ fi
 ${as_target_user} rm -f "${filename}.tmp"
 ${as_target_user} rm -f "${filename}"
 
-txtred=$(tput setaf 1)
-txtgreen=$(tput setaf 2)
-txtreset=$(tput sgr0)
-
 echo ""
 if [ "${exit_status}" = 0 ]; then
-    echo "${txtgreen}✔${txtreset} ${name}: test succeeded"
+    echo "${name}: test succeeded"
 else
-    echo "${txtred}✖${txtreset} ${name}: test failed (exit=${exit_status})"
+    echo "${name}: test failed (exit=${exit_status})"
 fi
 
 if [ -n "${use_exit_status}" ]; then