no. emotion is a natural built-in stimuli. When forming a memory - many things are (associated) attached with it - certain emotion and depending on each people - certain 5 senses or all.
no. the point is - it's to remove that memory. certain emotion is attached to that memory.
for example - when you have a paper cut, the emotions involved in this are fear and perhaps anger. now you have formed a memory of having a paper cut. You associated that memory with fear and anger. Because of memory and association - you have a fear of paper or whatsoever. By removing the memory of paper cut, you're not afraid of paper anymore. Your emotions (fear and anger) are still there but it's not associated with paper cut.
By removing that memory - you can't remember or don't know what you're angry/afraid about. This would greatly help those with crippling traumatic memories. I cannot think of anything more horrible than vividly reliving your worst nightmare nearly everyday.....
