In the link KristinaRoy posted above, Google states:
This is an advanced feature and should only be used with caution. If used incorrectly, this feature can potentially harm your site’s performance in Google’s search results. We recommend that you disavow backlinks only if you believe you have a considerable number of spammy, artificial, or low-quality links pointing to your site, and if you are confident that the links are causing issues for you. In most cases, Google can assess which links to trust without additional guidance, so most normal or typical sites will not need to use this tool.
Given that warning from Google themselves, it is quite beyond my comprehension why so many people are still advocating the use of this tool as a cure for all ills.
Do not use "disavow links" except as a last resort.
And as I said in my previous post, the question is whether or not these links should be regarded as spammy, not how to remove/disavow them. Please keep on-topic, or your post may be removed as fluff.