Dada2 trimming question

Hi,
I just read the post about primer removal in dada2 https://github.com/qiime2/q2-dada2/issues/32 in GitHub. Our data have primers as below:

The question is whether we need to remove the primers before running data2 denoise in QIIME 2, or we can trim the primers in the dada2 denoise section? If we have to remove the primers before running data2 in QIIME 2, how can do it? Please guide us!

Thanks,
Bing