Drop needless dependency to libdbus-glib-1-dev

As libdbus-glib-1-dev is deprecated in Bug#895291 [1], so it was removed from debian/control.in.

This commit fixes Bug#955963 Build-Depends on deprecated dbus-glib. [2]

dbus-glib is used with telepathy-glib, but it is explicitly disabled in debian/rules by --without-telepathy so it doesn't affect to build vinagre package.

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895291 [2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955963

Signed-off-by: Kentaro Hayashi kenhys@gmail.com