`ModOpRemoveMuscles` and other operators from [ModelOperators.h](https://github.com/opensim-org/opensim-core/blob/main/OpenSim/Actuators/ModelOperators.h) are missing from the official Doxygen pages for [4.5.1](https://simtk.org/api_docs/opensim/api_docs451/) and [4.5.2](https://simtk.org/api_docs/opensim/api_docs452/). Note that the operators from [ModelOperatorsDGF.h](https://github.com/opensim-org/opensim-core/blob/main/OpenSim/Moco/ModelOperatorsDGF.h) do appear in Doxygen.