My case was recently concluded and I received my 10 year GC, and I did not have an interview. My removal of conditions was also based on marriage to a US citizen, with me being from the UK, however I received my Green Card through a K1 visa so I had an interview as part of my Adjustment of Status application. My ROC case never went to the 'Ready to be scheduled for interview' stage, I just received an update saying 'We ordered your new card'. The fact yours changed to 'ready to be scheduled' looks to me like you will have the interview, and it's highly unlikely to be waived.