To remove Revoice Pro and its plug-ins from OS X you need to delete the following files
In the Applications folder delete Revoice Pro
/Applications/Revoice Pro.app
To delete the plug-ins you need to delete the following files
/Library/Application Support/Avid/Audio/Plug-Ins/RevoiceProLink.aaxplugin
/Library/Application Support/DigiDesign/Plug-Ins/RevoiceProLink.dpm
/Library/Audio/Plug-Ins/Components/RevoiceProMonitor.component
/Library/Audio/Plug-Ins/Components/RevoiceProLink.component
/Library/Audio/Plug-Ins/VST3/RevoiceProLink.vst3
/Library/Audio/Plug-Ins/VST3/RevoiceProMonitorVST.vst3