event-test: Remove forward declarations
event-test: Remove forward declarations

Most of the functions are no longer in this file. 'usage' does not need
a declaration.

zippy2/libvirt,olafhering/libvirt,andreabolognani/libvirt,jfehlig/libvirt,eskultety/libvirt,nertpinx/libvirt,libvirt/libvirt,crobinso/libvirt,andreabolognani/libvirt,jardasgit/libvirt,jfehlig/libvirt,olafhering/libvirt,libvirt/libvirt,jardasgit/libvirt,crobinso/libvirt,eskultety/libvirt,andreabolognani/libvirt,nertpinx/libvirt,eskultety/libvirt,zippy2/libvirt,fabianfreyer/libvirt,taget/libvirt,jfehlig/libvirt,datto/libvirt,zippy2/libvirt,crobinso/libvirt,taget/libvirt,taget/libvirt,jardasgit/libvirt,olafhering/libvirt,taget/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,eskultety/libvirt,jfehlig/libvirt,zippy2/libvirt,eskultety/libvirt,datto/libvirt,jardasgit/libvirt,datto/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,crobinso/libvirt,olafhering/libvirt,datto/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,libvirt/libvirt,datto/libvirt,taget/libvirt,libvirt/libvirt