Bug 20174: Remove xml_sax.pl target from Makefile.pl

Bug 20174: Remove xml_sax.pl target from Makefile.pl

There appears to be no xml_sax.pl in Koha, so the
reference should be removed.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit daf47da8cd9c94829ff49ec2041d39b1510ae6da)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit c6f2d8b7b168bc81e51211476f0374729611f9dc)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>