Puzzled about Removing People from the Church?

1 Corinthians 5:1-5

 1 It is actually reported that there is sexual immorality among you, and of a kind that even pagans do not tolerate: A man is sleeping with his father’s wife. 

 2 And you are proud! Shouldn’t you rather have gone into mourning and have put out of your fellowship the man who has been doing this? 

 3 For my part, even though I am not physically present, I am with you in spirit. As one who is present with you in this way, I have already passed judgment in the name of our Lord Jesus on the one who has been doing this. 

 4 So when you are assembled and I am with you in spirit, and the power of our Lord Jesus is present, 

 5 hand this man over to Satan for the destruction of the flesh, so that his spirit may be saved on the day of the Lord.