[gimp-perl] Remove reference to -I

[Ed J <edj src gnome org>]

commit a9e6959d2cde7defb6f22c43fb08cb0b5d33a3b0
Author: Ed J <edj src gnome org>
Date:   Sun May 1 02:16:45 2016 +0100

    Remove reference to -I

 Makefile.PL |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.PL b/Makefile.PL
index a75740b..d17a88a 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -29,7 +29,6 @@ mkdir $IDIR unless -d $IDIR;
 $pkg->save_config($IFILES);
 # reinit so no PM which breaks XSMULTI
 $pkg = ExtUtils::Depends->new(qw(Gimp Alien::Gimp Gtk2 PDL));
-# don't know why need -I here, works in EUMM "multi" test without
 $pkg->set_inc(q{-Ddatadir='""'});
 
 WriteMakefile(