chore(debian): Remove debian package indication from data-migractions test

cubicweb/server/test/data-migractions/cubicweb_fakecustomtype/__pkginfo__.py

@@ -63,5 +63,3 @@ for dirname in (
 ):
     if isdir(dirname):
         data_files.append([join(THIS_CUBE_DIR, dirname), listdir(dirname)])
-# Note: here, you'll need to add subdirectories if you want
-# them to be included in the debian package

cubicweb/server/test/data-migractions/cubicweb_fakeemail/__pkginfo__.py

@@ -66,5 +66,3 @@ for dirname in (
 ):
     if isdir(dirname):
         data_files.append([join(THIS_CUBE_DIR, dirname), listdir(dirname)])
-# Note: here, you'll need to add subdirectories if you want
-# them to be included in the debian package