Revert "vte3-gi test: modify test for `define constants under Terminal`"
Revert "vte3-gi test: modify test for `define constants under Terminal`"

This reverts commit 68ebd26985905bdef543245cd9a414b2ac51cb4d.

Avoiding deep class tree.

kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2,kitachro/ruby-gnome2