Bug 25388: There is no link for the "online help"

Bug 25388: There is no link for the "online help"

This patch removes a non-existent link to the online help from the marc
subfield editor.

To test:

1) Go to Admin > MARC Bibliographic framework > Edit MARC structure >
Edit subfield (for example /cgi-bin/koha/admin/marc_subfields_structure.pl?op=add_form&tagfield=000&frameworkcode=AR)
2) Check that the Max Length value in the Advanced constraints area
contains text saying "See online help"
3) Apply patch
4) Check that the reference to the online help has disappeared.

Remove tabs from start of line

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Joy Nelson <joy@bywatersolutions.com>