Remove clutter.symbols
Remove clutter.symbols

The symbols file is unused since Clutter 0.6, and the win32 backend
does not depend on it anymore.

collects/clutter,spatulasnout/clutter,djdeath/clutter-android,heysion/clutter-clone,djdeath/clutter,GNOME/clutter,ebassi/clutter,kerrickstaley/clutter-vala,collects/clutter,djdeath/clutter-android,spatulasnout/clutter,Distrotech/clutter,GNOME/clutter,djdeath/clutter-android,kerrickstaley/clutter-vala,GNOME/clutter,jigpu/clutter,heysion/clutter-clone,nobled/clutter,spatulasnout/clutter,dlespiau/clutter,jigpu/clutter,nobled/clutter,collects/clutter,rkudiyarov/clutter_osx,spatulasnout/clutter,djdeath/clutter,djdeath/clutter-android,jigpu/clutter,djdeath/clutter-multithreaded,Distrotech/clutter,djdeath/clutter-multithreaded,djdeath/clutter-android,kerrickstaley/clutter-vala,djdeath/clutter,nobled/clutter,rkudiyarov/clutter_osx,jigpu/clutter,rkudiyarov/clutter_osx,dlespiau/clutter,spatulasnout/clutter,Distrotech/clutter,jigpu/clutter,ebassi/clutter,kerrickstaley/clutter-vala,jigpu/clutter,djdeath/clutter-multithreaded,ebassi/clutter,djdeath/clutter,heysion/clutter-clone,collects/clutter,djdeath/clutter,Distrotech/clutter,ebassi/clutter,djdeath/clutter-multithreaded,collects/clutter,GNOME/clutter,GNOME/clutter,heysion/clutter-clone,rkudiyarov/clutter_osx,djdeath/clutter,dlespiau/clutter,ebassi/clutter,heysion/clutter-clone,Distrotech/clutter,Distrotech/clutter