plugin to remove unwanted comments

Your description “unwanted” is too subjective to attract a specific answer in this circumstance. You can easily remove any comments that you deem unwanted, from your comment moderation area in your dashboard.

[edit] …With such a rapid posting of very general questions (such as with an account as new as yours is ) it may not be necessary to post a link to your site in every request. If it starts looking like it’s for purposes other than support questions, you might draw attention for looking like you’re link spamming.