Abolished
"DEAD TO THE LAW" --The Pauline dispensational view of Scripture enables the life-centered believer to rightly divide the Word of truth to the extent that he knows the place and purpose of God's law.
1. He honors that law the Holy Spirit applied as a means of convicting him of sin, which prepared him for receiving the Saviour. "By the law is the knowledge of sin" (Rom. 3:20).
2. When converted he was positioned in the ascended Lord Jesus; he was not only identified with His risen life, but with His Calvary death unto sin as well (Rom. 6:3). In that death both the Lord Jesus and the believer died to the law. "The law hath dominion over a man as long as he liveth."  "Ye also are become dead to the law by the body of Christ."   "Now we are delivered from the law, having died to that in which we were held" (Rom. 7:1,4,6). By co-crucifixion we were delivered from the dominion of the law.
3. The law's just penalty--"the soul that sinneth, it shall die" (Ezek. 18:4)--was fulfilled by the believer's death with Christ. "For I, through the law, am dead to the law, that I might live unto God" (Gal. 2:19).  Thus God's holy law is upheld, honored, and its claims fully met. It has no more jurisdiction over the dead and risen believer; he is now "married to another, even to Him who is raised from the dead" (Rom. 7:4).

katargeo,  kat-arg-eh'-o

The words “Having ABOLISHED, in Eph 2:15 means to be (render) entirely idle (useless), literally or figuratively:--abolish, cease, cumber, deliver, destroy, do away, become (make) of no (none, without) effect, fail, loose, bring (come) to nought, put away (down), vanish away, make void.

Romans 3:3 What if some did not have faith? Will their lack of faith nullify God's faithfulness?

Romans 4:14 For if those who live by law are heirs, faith has no value and the promise is worthless,  15 because law brings wrath. And where there is no law there is no transgression.

Gal 3:17 What I mean is this: The law, introduced 430 years later, does not set aside the covenant previously established by God and thus do away with the promise.

Gal 2:17 "If, while we seek to be justified in Christ, it becomes evident that we ourselves are sinners, does that mean that Christ promotes sin? Absolutely not!

Gal 5:4 You who are trying to be justified by law have been alienated from Christ; you have fallen away from grace

1 Cor 2:8 None of the rulers of this age understood it, for if they had, they would not have crucified the Lord of glory.

1Cor 13:10 but when perfection comes, the imperfect disappears.

2 Cor 3:7 Now if the ministry that brought death, which was engraved in letters on stone, came with glory, so that the Israelites could not look steadily at the face of Moses because of its glory, fading though it was,

2 Cor 3:11 And if what was fading away came with glory, how much greater is the glory of that which lasts!

2 Cor 3:14 But their minds were made dull, for to this day the same veil remains when the old covenant is read. It has not been removed, because only in Christ is it taken away.

Romans 3:31 Do we, then, nullify the law by this faith? Not at all! Rather, we uphold the law.

(The thought moves into Romans 4)
Romans 4:1 What then shall we say that Abraham, our forefather, discovered in this matter? 2 If, in fact, Abraham was justified by works, he had something to boast about-- but not before God. 3 What does the Scripture say? "Abraham believed God, and it was credited to him as righteousness."

Romans 7:2 For example, by law a married woman is bound to her husband as long as he is alive, but if her husband dies, she is released from the law of marriage.

Romans 7:6 But now, by dying to what once bound us, we have been released from the law so that we serve in the new way of the Spirit, and not in the old way of the written code.

1Cor 13:11 When I was a child, I talked like a child, I thought like a child, I reasoned like a child. When I became a man, I put childish ways behind me.

Romans 6:6 For we know that our old self was crucified with him so that the body of sin might be done away with, that we should no longer be slaves to sin-- because anyone who has died has been freed from sin.

(What is the power of death?)
Ro 7:9 For I was alive without the law once: but when the commandment came, sin revived, and I died.

Heb 2:14 Since the children have flesh and blood, he too shared in their humanity so that by his death he might destroy him who holds the power of death-- that is, the devil—

It is clear from all these passages that whatever is abolished is completely null and void. What is it here that is abolished?  It is the law of the commandments in decrees, or the law of dogmatic commandments.  The word for ordinances is dogma, translated decree and ordinances. The law was given to expose sin and to keep the Jews a distinct people until Christ came. After that it was no longer needful.
Law & Grace
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