goodroi - 10:59 am on May 24, 2012 (gmt 0)
If you remove the signals from your content that is triggering Google's local map link then it won't appear anymore. Google has probably noticed you are mentioning certain local keywords several times and thought they would add value for their users.
I wouldn't do this but you could replace the local keywords with images of text so Google would not see your local keywords.
Reminder to others: This is a discussion about Google SEO so let's keep it focused on just that.