Todd Chrisley’s oldest son won’t have to worry about joining his dad behind bars. Kyle Chrisley is off the hook for the alleged knife attack on his boss last year as RadarOnline.com has confirmed the case was dismissed. A representative for the Smyrna Court Clerk’s Office in Tenessee told us that his aggravated assault case was closed on April 9, meaning he’s no longer facing his felony charge. As this outlet reported, Kyle was accused of savagely beating Deven Campbell with a fixed knife inside a Smyrna trucking company’s office during a heated dispute over a $36 difference in his paycheck. T…