removed setCanChangeWebcam becaus not needed and this fixes the bug with unable to select camara if only 1 webcam is connected

app/lib/redux/STATE.md

@@ -18,7 +18,6 @@
     device               : { flag: 'firefox', name: 'Firefox', version: '61' },
     canSendMic           : true,
     canSendWebcam        : true,
-    canChangeWebcam      : false,
     webcamInProgress     : false,
     audioOnly            : false,
     audioOnlyInProgress  : false,

app/lib/redux/stateActions.js

@@ -62,14 +62,6 @@ export const setAudioDevices = (devices) =>
 	};
 };
 
-export const setCanChangeWebcam = (flag) =>
-{
-	return {
-		type    : 'SET_CAN_CHANGE_WEBCAM',
-		payload : flag
-	};
-};
-
 export const setWebcamDevices = (devices) =>
 {
 	return {