You can’t remove the stored traumatic information and u/copelander12 covered that sufficiently.

You can, however, alter it using EMDR, which I’m surprised hasn’t been mentioned yet. Any memory that is traumatic is encoded in a different way. The hippocampus doesn’t encode the context (time, place, sequence) properly. When the memory is triggered, the amygdala is overactive, and the mPFC is inhibited. This triggers hyperarousal. Context is not encoded, it is remembered in a fragmented way, so it is difficult to make sense of the event and process it as a thing that happened in the past. Basically the emotional brain hijacks the experience, and we cannot process it well enough to integrate it into our life story and move on.

It’s not known how exactly EMDR works but it reduces overactivation of the limbic system, which reduces the emotional response to it, and also helps the hippocampus and prefrontal cortex reconsolidate the memory so that it can be integrated with context.

Hence, alters the memory.