CEDAR RAPIDS — A social media post thought to be a school shooting threat prompted Cedar Rapids police to respond to schools in the Cedar Rapids Community School District on Thursday.Police determined there was no threat to Cedar Rapids schools.The author of the four-day-old social media post did not intend to make “any sort of threat,” according to a school district statement.“Police officers made contact with the individual that posted the photograph,” district spokeswoman Akwi Nji said in an email.