Remove a useless piece of code in MakeBlockMap. It was a remnant from when ruy was trying to skip the packing phase in some cases, letting kernels operate directly on source matrices. In that case, there was a difficulty if the matrix sizes were not multiples of kernel size and there was only one block.
Remove a useless piece of code in MakeBlockMap.
It was a remnant from when ruy was trying to skip the packing phase in
some cases, letting kernels operate directly on source matrices.
In that case, there was a difficulty if the matrix sizes were not multiples
of kernel size and there was only one block.

PiperOrigin-RevId: 259989627

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