Drop old %triggerin scripts to unbreak the build
    
    Rebuilding nfs-utils led to rpmbuild erroring out with:
    
    error: line 262: Trigger fired by the same package is already defined in spec file: %triggerin -- nfs-utils < 1:1.3.1-4.0
    
    To fix the build, this commit drops the old %triggerin scripts that
    rpmbuild doesn't like. We are already at F24; the scripts were there to
    support upgrades from nfs-utils 1.3.0 that was in F20 and upgrades from
    F20 were only supported up to F22 on the distro level.