Revert "Add debug property to disable the watchdog"

This reverts commit d1c470756f962801e7d3bc19bee9440f33a4706e.

Spigot-Server-Patches/Show-Paper-in-client-crashes-server-lists-and-Mojang.patch

@@ -59,11 +59,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          this.restart = restart;
      }
 @@ -0,0 +0,0 @@ public class WatchdogThread extends Thread
-         while ( !stopping )
-         {
-             //
--            if ( lastTick != 0 && System.currentTimeMillis() > lastTick + timeoutTime )
-+            if ( !Boolean.getBoolean("disable.watchdog") && lastTick != 0 && System.currentTimeMillis() > lastTick + timeoutTime ) // Paper - Add property to disable
              {
                  Logger log = Bukkit.getServer().getLogger();
                  log.log( Level.SEVERE, "The server has stopped responding!" );