Remove BoundingBoxEvent cancellability

Was causing problems, and there's an alternative method to achieve the same results.

Author: ZeroMemes

src/main/java/clientapi/event/defaults/game/world/BoundingBoxEvent.java

@@ -16,7 +16,6 @@
 
 package clientapi.event.defaults.game.world;
 
-import me.zero.alpine.type.Cancellable;
 import net.minecraft.block.Block;
 import net.minecraft.entity.Entity;
 import net.minecraft.util.math.AxisAlignedBB;
@@ -32,7 +31,7 @@
  * @author Brady
  * @since 4/10/2017 12:00 PM
  */
-public final class BoundingBoxEvent extends Cancellable {
+public final class BoundingBoxEvent {
 
     /**
      * The block itself
@@ -68,7 +67,8 @@ public BoundingBoxEvent(Block block, BlockPos pos, AxisAlignedBB aabb, List<Axis
     }
 
     /**
-     * Sets the block's bounding box
+     * Sets the block's bounding box. Setting it to
+     * {@code null} will effectively cancel the call.
      *
      * @param aabb New bounding box
      * @return This event

src/main/java/clientapi/load/mixin/MixinBlock.java

@@ -27,7 +27,6 @@
 import net.minecraft.world.IBlockAccess;
 import net.minecraft.world.World;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.Redirect;
@@ -55,12 +54,11 @@ private void canCollideCheck(IBlockState state, boolean hitIfLiquid, CallbackInf
     }
 
     @Inject(method = "addCollisionBoxToList(Lnet/minecraft/block/state/IBlockState;Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/AxisAlignedBB;Ljava/util/List;Lnet/minecraft/entity/Entity;Z)V",
-            at = @At("HEAD"), cancellable = true)
+            at = @At("HEAD"))
     private void in(IBlockState state, World world, BlockPos pos, AxisAlignedBB entityBox, List<AxisAlignedBB> collidingBoxes, @Nullable Entity entity, boolean isActualState, CallbackInfo ci) {
         Block block = (Block) (Object) (this);
         bbEvent = new BoundingBoxEvent(block, pos, block.getCollisionBoundingBox(state, world, pos), collidingBoxes, entity);
         ClientAPI.EVENT_BUS.post(bbEvent);
-        if (bbEvent.isCancelled()) ci.cancel();
     }
 
     @Redirect(method = "addCollisionBoxToList(Lnet/minecraft/block/state/IBlockState;Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/AxisAlignedBB;Ljava/util/List;Lnet/minecraft/entity/Entity;Z)V",