At the moment, there is no way to completely remove a game that you don't really like playing. However as a Pro user, you can swap 1 game per category per day if it appears in your workout of the day.
For iOS:
To swap a game in your workout, what you need to do is, before you start playing, tap on your daily workout and swap the game you want by swiping it to the left with your finger.
For Android:
To swap a game in your workout, what you need to do is, before you start playing, tap on your daily workout and swap the game you want by tapping and holding until the 'Switch game' option appears then tap on it.
Please note that you can only swap games if you haven't started playing yet.