BLAS L2 Benchmarks missing

[nightduck]

In the documentation, there is a reference to the path blas/L2/benchmarks/memKernel/gemm_4CU, but this doesn't exist. The benchmarks folder contains a README and nothing else.

[nightduck]

The instructions in the README do not work. The make command returns

make: *** No rule to make target 'run'. Stop.

Because the blas directory that we're instructed to run in has no makefile. In fact, at no point in the repo history has there ever been a makefile in that location. So conceivably, these instructions never worked, and it's unclear what or where the gemm_4CU benchmark is.