Remove fork of processTransform.js when merging upstream changes

[acoates-ms]

PR on core to stop special casing iOS/Android:
react/react-native#33579

[rozele]

One thing to watch out for is that, IIRC, the float4x4 multiply function is not identical to the matrix multiplication used in processTransform.js. When I was implementing the frame tick animations module, I had to port the processTransform.js logic to C++:
https://github.com/microsoft/react-native-windows/pull/9249/files#diff-fd4bb341735c7671ad010562b9197d59aed2a1dc7024b6b1df35802d75fde01dR114-R119