Update templates/compatible/flextGL.c.template
Update templates/compatible/flextGL.c.template

Removing unused glfw.h include that was causing problems on systems without installed GLFW.
eternalrain/flextGL,mosra/flextgl,mosra/flextgl,mosra/flextgl,ginkgo/flextGL,ginkgo/flextGL,ginkgo/flextGL