Remove weak-modules from kmod in Fedora
    
    Fedora does not support CONFIG_MODVERSIONS, as we have no guarantee of
    KABI.  With this in mind, the weak-modules script adds no benefit to
    Fedora, but it can cause serious issues with update times on major
    kernel rebases, and with dkms.  This patch removes the script from
    Fedora, but leaves it in place for ELN/CentOS/RHEL, etc.
    
    Signed-off-by: Justin M. Forbes <jforbes@fedoraproject.org>