Remove a line that is not needed

Author: stephenxs

orchagent/mirrororch.h

@@ -7,7 +7,6 @@
 #include "neighorch.h"
 #include "routeorch.h"
 #include "fdborch.h"
-//#include "switch_capabilities.h"
 #include "policerorch.h"
 
 #include "ipaddress.h"