Remove unused Http2Stream destructor
Remove unused Http2Stream destructor

SolidWallOfCode/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,duke8253/trafficserver,bryancall/trafficserver,SolidWallOfCode/trafficserver,dyrock/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,dyrock/trafficserver,pbchou/trafficserver,duke8253/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,dyrock/trafficserver,dyrock/trafficserver,chitianhao/trafficserver,davidbz/trafficserver,vmamidi/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,chitianhao/trafficserver,davidbz/trafficserver,bryancall/trafficserver,dyrock/trafficserver,pbchou/trafficserver,duke8253/trafficserver,bryancall/trafficserver,davidbz/trafficserver,duke8253/trafficserver,dyrock/trafficserver,vmamidi/trafficserver,dyrock/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,chitianhao/trafficserver,chitianhao/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,bryancall/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,davidbz/trafficserver,duke8253/trafficserver