LAUREL - Citing ongoing "health challenges," Laurel Mayor Dave Waggoner announced in a letter to the city council and community on Tuesday morning that he is resigning from office.Waggoner's resignation comes just one day before the deadline for a recall election to be set in the fall.Waggoner came under fire from some in the community for his support of a state plan to build a forensic mental health facility in the community.He argued in a rece…