Content-Type header sent in HTTP 204 responses

[Anthony-Stannard]

A successful request to /auth/invalidate-sessions will result in an HTTP 204 response being returned.
The HTTP 204 response will have a Content-Type header when it shouldn't have this header.

A simple fix would be to remove the empty dictionary from the POST Response in the InvalidateSessions and InvalidateRefreshTokens class:

Current line 281 in views.py
return Response({}, status=HTTP_204_NO_CONTENT)

Can be fixed with:
return Response(status=HTTP_204_NO_CONTENT)