Athosanswered grow question 6 years ago I have tried doing it and not doing it. Ten growers will give you ten diferent answers to this controversial issue.
If you are going ahead with it, do keep in mind that for whatever leaf you pluck, there should be another below to catch the light that it was receiving.
Also defoliation will slow your plant growth.
My last grow I did it and the yield was great, wheter due defoliation or something else I can't tell.