Merge pull request #11964 from ramonlsouza/remove-returnless-function

.../api/annotations/server/handlers/whiteboardAnnotations.js

...luebutton-html5/imports/api/users/server/eventHandlers.js

...utton-html5/imports/api/users/server/handlers/getUsers.js

.../imports/api/voice-users/server/handlers/getVoiceUsers.js

...ml5/imports/api/voice-users/server/handlers/voiceUsers.js