[aur-general] Required by entries are listed twice

[member graysky]

For example, https://aur.archlinux.org/packages/linux-ck/
Required by (26)

   - broadcom-wl-ck <https://aur.archlinux.org/packages/broadcom-wl-ck/>
   - broadcom-wl-ck <https://aur.archlinux.org/packages/broadcom-wl-ck/>
   - lirc-ck <https://aur.archlinux.org/packages/lirc-ck/>
   - lirc-ck <https://aur.archlinux.org/packages/lirc-ck/>
   - nct677x-ck-git <https://aur.archlinux.org/packages/nct677x-ck-git/>
   - nct677x-ck-git <https://aur.archlinux.org/packages/nct677x-ck-git/>
   - ndiswrapper-linux-ck<https://aur.archlinux.org/packages/ndiswrapper-linux-ck/>
   - ndiswrapper-linux-ck<https://aur.archlinux.org/packages/ndiswrapper-linux-ck/>
   - nvidia-275xx-ck <https://aur.archlinux.org/packages/nvidia-275xx-ck/>
   - nvidia-275xx-ck <https://aur.archlinux.org/packages/nvidia-275xx-ck/>
   - nvidia-304xx-ck <https://aur.archlinux.org/packages/nvidia-304xx-ck/>
   - nvidia-304xx-ck <https://aur.archlinux.org/packages/nvidia-304xx-ck/>
   - nvidia-beta-ck <https://aur.archlinux.org/packages/nvidia-beta-ck/>
   - nvidia-ck <https://aur.archlinux.org/packages/nvidia-ck/>
   - nvidia-ck <https://aur.archlinux.org/packages/nvidia-ck/>
   - nvidia-ck-bumblebee<https://aur.archlinux.org/packages/nvidia-ck-bumblebee/>
   - nvidia-ck-bumblebee<https://aur.archlinux.org/packages/nvidia-ck-bumblebee/>
   - nvidia-ck-corex-bumblebee<https://aur.archlinux.org/packages/nvidia-ck-corex-bumblebee/>
   - nvidia-ck-corex-bumblebee<https://aur.archlinux.org/packages/nvidia-ck-corex-bumblebee/>
   - r8168-ck <https://aur.archlinux.org/packages/r8168-ck/>
   - r8168-ck <https://aur.archlinux.org/packages/r8168-ck/>
   - tp_smapi-ck <https://aur.archlinux.org/packages/tp_smapi-ck/>
   - vhba-module-ck <https://aur.archlinux.org/packages/vhba-module-ck/>
   - vhba-module-ck <https://aur.archlinux.org/packages/vhba-module-ck/>
   - virtualbox-ck-modules<https://aur.archlinux.org/packages/virtualbox-ck-modules/>
   - virtualbox-ck-modules<https://aur.archlinux.org/packages/virtualbox-ck-modules/>