Removing gtk+3 directory from AC_CONFIG_FILES on configure.ac
Removing gtk+3 directory from AC_CONFIG_FILES on configure.ac

That directory was removed on a previous commit

https://bugzilla.gnome.org/show_bug.cgi?id=678315

GNOME/at-spi2-core,GNOME/at-spi2-atk,Distrotech/at-spi2-atk,GNOME/at-spi2-core,GNOME/at-spi2-core,Distrotech/at-spi2-atk