People are getting confused. The Constitution lays out specific Constitutional authority for the Federal government. The Founding Fathers thought it was clear in the document that any power not granted by the Constitution wasn't an authority and therefore the Federal government couldn't do it. The Bill of Rights were introduced at the Constitutional Convention and were largely ignored because no one thought they were necessary. Alexander Hamilton even wrote they were dangerous because they suggested the Federal government had authority it didn't.
Anyway, when they passed the bill of rights, they made that explicit in the 10th Amendment, any authority not granted in the Constitution to the Federal government is prohibited to the Federal government. And the 9th Amendment stated that just because a right of the people is not reserved in the Constitution/Bill of Rights/Future Amendments doesn't mean it's any less important then other rights that are listed.
So, the issue is that if an introducer of legislation cannot cite a specific Constitutional Authority for that legislation, the legislation is clearly unconstitutional by the 9th and 10th Amendments. It had nothing to do with repealing laws.
There's more than one issue involved here.
First and most important, a bill in Congress repealing a law IS a proposed law. There is no procedural difference between a bill to implement a program and a bill to end one. They both must follow the same process and both must have constitutional authority.
Do we say it's not a case when SCOTUS reverses one of its own opinions, simply because the net result was to take a precedent off the books with the new decision? No. The same goes for Congress. A repeal is a law whose net effect is to take another law off the books. But it's still a law.
That said, of COURSE the repeal of a law that Congress made will be constitutional under the exact same authority as the law it repeals. It's addressing the same issue, is it not?
But the House rule now clearly states every piece of legislation that is proposed must have the statement of authority in it. The repeal bill lacks that statement. If the Members themselves don't understand that a statute repealing another statute is, in fact, still a statute, we're well and truly screwed.