Tested-by: Jun Zhao <mypopydev@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

This was added in early 2013 and abandoned several months later; as far as
I can tell, there are no external users.  Future OpenCL use will be via
hwcontext, which requires neither special OpenCL-only API nor global state
in libavutil.

All internal users are also deleted - this is just the unsharp filter
(replaced by unsharp_opencl, which is more flexible) and the deshake filter
(no replacement).

 Adds ui64 (uint64_t) as a possible type for SpecifierOpt. This enables
 use of uint64_t options with SpecifierOpt such as channel_layout
 when expressed as a 64 bit channel mask.

Signed-off-by: pkviet <pkv.stream@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>