No mention of the holy Spirit restraining, so do not include it.
The abomination of desolation is not mentioned in Revelation, but the description of it is. Paul said to the Thessalonians "Don't you remember that I used to tell you these things when I was with you," which means that they knew who Paul was referring to when he said, "the One who is holding the man of lawlessness back will continue to do so until He is taken out of the way."
There are many things in the word of God that are revealed by the Spirit and the "one who now restrains" is one of them, the restrainer being the Holy Spirit. No one else but God could hold back the man of lawlessness.