Shorten template even further.

Author: tstromberg

.github/ISSUE_TEMPLATE

@@ -1,9 +1,5 @@
-<!-- <START-HIDDEN-TEXT>
-
 If this is a bug report, please include:
 
 - [ ] How to replicate the error, including the exact command-lines used.
 - [ ] The full output of the command that failed
 - [ ] The operating system name and version used
-
-<END-HIDDEN-TEXT> - Please write your issue below this line. Thank you for your contribution!  -->