llama.cpp

1adc9812 - fix(nix): remove non-functional llama-cpp cachix cache from flake.nix (#15295)

fix(nix): remove non-functional llama-cpp cachix cache from flake.nix (#15295) The flake.nix included references to llama-cpp.cachix.org cache with a comment claiming it's 'Populated by the CI in ggml-org/llama.cpp', but: 1. No visible CI workflow populates this cache 2. The cache is empty for recent builds (tested b6150, etc.) 3. This misleads users into expecting pre-built binaries that don't exist This change removes the non-functional cache references entirely, leaving only the working cuda-maintainers cache that actually provides CUDA dependencies. Users can still manually add the llama-cpp cache if it becomes functional in the future.