Remove CPU build info (unsupported)

README.md

@@ -21,19 +21,15 @@ The `:latest` tag points to `:latest-cuda`
 Tags follow these patterns:
 
 ##### _CUDA_
-- `:cuda-[x.x.x]-[base|runtime]-[ubuntu-version]`
+- `:cuda-[x.x.x]-runtime-[ubuntu-version]`
 
-- `:latest-cuda` → `:cuda-11.8.0-base-22.04`
+- `:latest-cuda` → `:cuda-12.1.1-runtime-22.04`
 
 ##### _ROCm_
 - `:rocm-[x.x.x]-runtime-[ubuntu-version]`
 
 - `:latest-rocm` → `:rocm-5.7-runtime-22.04`
 
-##### _CPU_
-- `:cpu-ubuntu-[ubuntu-version]`
-
-- `:latest-cpu` → `:cpu-22.04` 
 
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