Finish WinMM Removal (#17678)
Summary of the issue:
There are still some remnants of WinMM left in NVDA, as well as some no-longer used code.
Description of user facing changes
None.
Description of development approach
Removed nvwave.getOutputDevices, nvwave.OutputDeviceIdToName and nvwave.outputDeviceNameToId, as these are no longer used internally.
Renamed nvwave.WasapiWavePlayer to WavePlayer, and removed the WavePlayer variable that proxied WasapiWavePlayer.
Removed the underscore prefixes from utils.mmdevice._AudioOutputDevice and utils.mmdevice.getOutputDevices.
