No, the proper response to that is still not a curve, it's to identify which block of questions wasn't appropriate and removing those from scoring or turning them into "bonus points" and similar measures.
That way you don't incur any of the (pretty severe) drawbacks of a curve but don't punish students for questions that were badly phrased or weren't properly taught.
Simply removing the offending questions after the fact doesn't solve everything. Students may have fruitlessly wasted a ton of time on those questions, causing their grade in other parts of the test to suffer.
That way you don't incur any of the (pretty severe) drawbacks of a curve but don't punish students for questions that were badly phrased or weren't properly taught.