Removed redundant if checks

[dniym]

Removals

• Removes approx 30 redundant if checks from the PKListener. These If Checks will never fire because ignoreCancelled=true is set in the @eventhandler line. Thus they just serve to make the listener longer.

[ChristopherWMM]

We would want to leave this EventHandler as is.

[dniym]

I feel like with this eventHandler changed, the lines just below there do the exact same thing.
if (event.isCancelled())
return;

Unless there's just some super special circumstance where shockwave needs to be checked even if the event is cancelled, in that case you should probably re-add the other two lines that are removed in that method. (830-831)