TT#72807 Revert "TT#68720 Mute awk cores on upgrade stretch->buster"

Remove unnecessary awk core mute on stretch->buster upgrade.
It was a crash produced by newly incomming SSH connection during libc upgrade.
Jenkins was checking upgrade status via SSH on GCloud, as port 4242 was closed.
Now Jenkins has direct access to port 4242 on GCLoud VMs and SSH is not in use.

This reverts commit 4288d67c1f.

Change-Id: Ifdcf62828f6ca63e2d0c6bd103fd0980ad05a111

testrunner

@@ -21,18 +21,6 @@ if ls /var/lib/systemd/coredump/core.perl-fcgi* >/dev/null 2>&1 ; then
   diag "========================== DONE =============================="
 fi
 
-if ls /var/lib/systemd/coredump/core.awk* >/dev/null 2>&1 ; then
-  diag "================== NOTE: CORE DUMP DETECTED =================="
-  diag "= 2) TT#68720: Renaming awk cores /var/lib/systemd/coredump/core.awk"
-  ls -la /var/lib/systemd/coredump/core.awk*
-  for file in /var/lib/systemd/coredump/core.awk* ; do
-    mv "${file}" /var/lib/systemd/coredump/RENAMED_"$(basename "${file}")"
-  done
-  diag "= New cores names are:"
-  ls -la /var/lib/systemd/coredump/RENAMED_core.awk*
-  diag "========================== DONE =============================="
-fi
-
 goss="goss-0.3.5-e6140f90+patch_319-linux-amd64"
 
 if [ ! -x "/usr/sbin/${goss}" ] ; then