I am sure Telus is well aware of Flash and it's EOL. When they have something to announce it will be known. Till then all we can do is speculate when it may/may not occur. Judging from a UI shift on the iOS and Android platforms I'm sure something is in the works. But again can only speculate.
I just received an email from TELUS regarding this.
Starting Nov. 9, we're making some upgrades to the way you access your Optik TV services through the app and your browser. The biggest change you'll notice is that Flash is no longer required to access Optik TV through your browser along with several other upgrades for an even better experience.