configure: remove the --enable-quartz option
configure: remove the --enable-quartz option

Until we have a standalone quartz winsys we don't want to define a
winsys name called "quartz" which is what the current --enable-quartz
option does. For now anyone building for OSX needs to use the stub
winsys and setup their own GL context.

djdeath/cogl-android,Distrotech/cogl,gcampax/cogl,Distrotech/cogl,Distrotech/cogl,spatulasnout/cogl,gcampax/cogl,spatulasnout/cogl,gcampax/cogl,djdeath/cogl-android,djdeath/cogl-android,djdeath/cogl,collects/cogl,collects/cogl,Distrotech/cogl,djdeath/cogl,gcampax/cogl,djdeath/cogl