UnicornDarkness [1] filed a deletion request for cpu-x-opencl [2]: This package was created because OpenCL support was disabled by default since CPU-X v4.5.3. Now, since CPU-X v5.2.0, OpenCL support is enabled by default so this package is a duplicate of the cpu-x package in Extra repo.
[1] https://aur.archlinux.org/account/UnicornDarkness/ [2] https://aur.archlinux.org/pkgbase/cpu-x-opencl/