Remove support for Nvidia & AMD GPU, because the oneAPI plugin for Nvidia & AMD GPU is unavailable: download/installation channels are out of work. (#19246)

User can't build up the software for Nvidia & AMD GPU.
rm the oneMath since it is only used in NV and AMD code path.

ggml/src/ggml-sycl/rope.cpp

@@ -207,7 +207,6 @@ static void rope_vision(const T * x, T * dst, const int ne0, const int ne1, cons
         const int p = sector;
         theta_base  = pos[channel_x] * sycl::pow(theta_scale, (float) p);
     } else {
-        // Simplified from CUDA backend code: if (sector >= sections.v[0] && sector < sec_w) which is just sector >= sections.v[0]
         const int p = sector - sections.v[0];
         theta_base  = pos[channel_x + ne2] * sycl::pow(theta_scale, (float) p);
     }