Drop recent work on ratios.

This reverts commit a3334c124dc597340954749ff6f501c18d638752
This reverts commit 0671b541b1ee2935a2053b2470197487264797df
This reverts commit 4efd3a93cc370c4845faec37d06b5096590233af
This reverts commit d7bb06cc30052b53338aee764af4450ed8ce1f03
This reverts commit b8153788357a08c01955157bafab059345466b94