build: Remove mention of missing file
build: Remove mention of missing file

There is no clutter-event-gdk.h in the build.

Distrotech/clutter,Distrotech/clutter,collects/clutter,jigpu/clutter,djdeath/clutter,kerrickstaley/clutter-vala,GNOME/clutter,GNOME/clutter,jigpu/clutter,GNOME/clutter,djdeath/clutter,kerrickstaley/clutter-vala,collects/clutter,djdeath/clutter-multithreaded,heysion/clutter-clone,djdeath/clutter-multithreaded,jigpu/clutter,heysion/clutter-clone,djdeath/clutter,djdeath/clutter-multithreaded,collects/clutter,djdeath/clutter-android,ebassi/clutter,djdeath/clutter-android,djdeath/clutter-android,heysion/clutter-clone,Distrotech/clutter,ebassi/clutter,kerrickstaley/clutter-vala,djdeath/clutter,djdeath/clutter,jigpu/clutter,Distrotech/clutter,djdeath/clutter,ebassi/clutter,djdeath/clutter-android,djdeath/clutter-android,Distrotech/clutter,ebassi/clutter,collects/clutter,heysion/clutter-clone,djdeath/clutter-multithreaded,jigpu/clutter,GNOME/clutter,Distrotech/clutter,heysion/clutter-clone,collects/clutter,jigpu/clutter,ebassi/clutter,GNOME/clutter,kerrickstaley/clutter-vala