Reverting the Drop API for now, we need to re-evalute this as it is causing too many issues and blocking releases.

This reverts commits:
- d2d03afc8854394aeefb40ea5ebf224c8032b19f
- 6245746e91123dd8ef70e5f15b7cdfc7e36d8e8c
- 41fae5c613e9e69a8f6bdf33b23bb09d7f407433
- c34bdecab42cf4098054a5ea43e1c2958d44ae92
- d7445084ac9a90fa0b66d8b050b8d0d2a062eaf3
- 6a6ed2e6ae2328a8a791bcc6857c44dc6c6a7030
- a783bc4dc95da8e26c673abe48fad96b550aba28
- cb50fd68766df8e07631ba5be85759f8257e8068
- 34dfff2ad5c407c712b2783f02960aac5e8649f2
- f33b513820de987b49a4338e85df80968217a601
- 5fd9fdfde055e6eb6a83db246d009b69377b7c94
- 2795b116f40d06551fbb7b96d1963c0ddbeac384

src/main/java/net/minecraft/server/BlockSnow.java

@@ -46,7 +46,7 @@ public class BlockSnow extends Block {
         if (!this.canPlace(world, i, j, k)) {
             this.b(world, i, j, k, world.getData(i, j, k), 0);
             world.setRawTypeId(i, j, k, 0); // CraftBukkit
-            world.notify(i, j, k); // CraftBukkit - Notfiy clients of the reversion
+            world.notify(i, j, k); // CraftBukkit - Notify clients of the reversion
             return false;
         } else {
             return true;
@@ -54,31 +54,19 @@ public class BlockSnow extends Block {
     }
 
     public void a(World world, EntityHuman entityhuman, int i, int j, int k, int l) {
-        /* CraftBukkit start - This logic is exactly the same as in the superclass method, so defer it there
         int i1 = Item.SNOW_BALL.id;
         float f = 0.7F;
         double d0 = (double) (world.random.nextFloat() * f) + (double) (1.0F - f) * 0.5D;
         double d1 = (double) (world.random.nextFloat() * f) + (double) (1.0F - f) * 0.5D;
         double d2 = (double) (world.random.nextFloat() * f) + (double) (1.0F - f) * 0.5D;
         EntityItem entityitem = new EntityItem(world, (double) i + d0, (double) j + d1, (double) k + d2, new ItemStack(i1, 1, 0));
-        // This is done so that getDrops() in the BlockBreakEvent works properly.
 
         entityitem.pickupDelay = 10;
         world.addEntity(entityitem);
-        */
-        this.doActualDrop(world, i, j, k);
-        // CraftBukkit end
         world.setTypeId(i, j, k, 0);
         entityhuman.a(StatisticList.C[this.id], 1);
     }
 
-    // CraftBukkit start - Calculate drops
-    public java.util.ArrayList<ItemStack> calculateDrops(World world, EntityHuman entityhuman, int i, int j, int k, int l) {
-        this.a(world, i, j, k, new ItemStack(Item.SNOW_BALL.id, 1, 0));
-        return this.dropList;
-    }
-    // CraftBukkit end
-
     public int getDropType(int i, Random random, int j) {
         return Item.SNOW_BALL.id;
     }