runner: remove import from java.lang Package

Change-Id: Iedad24dfbdd60a05a09888f699f2467960f5cbe9
Reviewed-on: https://gerrit.libreoffice.org/11933
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>