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/BlockLeaves.java

@@ -161,27 +161,12 @@ public class BlockLeaves extends BlockTransparant {
     public void a(World world, EntityHuman entityhuman, int i, int j, int k, int l) {
         if (!world.isStatic && entityhuman.U() != null && entityhuman.U().id == Item.SHEARS.id) {
             entityhuman.a(StatisticList.C[this.id], 1);
-            /* CraftBukkit start - moved this line into calculateDrops
             this.a(world, i, j, k, new ItemStack(Block.LEAVES.id, 1, l & 3));
-            */
-            this.doActualDrop(world, i, j, k);
-            // CraftBukkit end
         } else {
             super.a(world, entityhuman, i, j, k, l);
         }
     }
 
-    // CraftBukkit start - Calculate drops
-    public java.util.ArrayList<ItemStack> calculateDrops(World world, EntityHuman entityhuman, int i, int j, int k, int l) {
-        if (!world.isStatic && entityhuman.U() != null && entityhuman.U().id == Item.SHEARS.id) {
-            this.a(world, i, j, k, new ItemStack(Block.LEAVES.id, 1, l & 3));
-        } else {
-            return super.calculateDrops(world, entityhuman, i, j, k, l);
-        }
-        return this.dropList;
-    }
-    // CraftBukkit end
-
     protected int getDropData(int i) {
         return i & 3;
     }