Fix a few IDE warnings (#1345)

src/main/java/carpet/helpers/OptimizedExplosion.java

@@ -229,7 +229,7 @@ public class OptimizedExplosion
 
         if (damagesTerrain)
         {
-            ObjectArrayList<Pair<ItemStack, BlockPos>> objectArrayList = new ObjectArrayList();
+            ObjectArrayList<Pair<ItemStack, BlockPos>> objectArrayList = new ObjectArrayList<>();
             Collections.shuffle(e.getToBlow(), world.random);
 
             for (BlockPos blockpos : e.getToBlow())
@@ -291,7 +291,7 @@ public class OptimizedExplosion
         int i = objectArrayList.size();
 
         for(int j = 0; j < i; ++j) {
-            Pair<ItemStack, BlockPos> pair = (Pair)objectArrayList.get(j);
+            Pair<ItemStack, BlockPos> pair = objectArrayList.get(j);
             ItemStack itemStack2 = pair.getLeft();
             if (ItemEntity.areMergable(itemStack2, itemStack)) {
                 ItemStack itemStack3 = ItemEntity.merge(itemStack2, itemStack, 16);

src/main/java/carpet/helpers/ParticleDisplay.java

@@ -50,7 +50,6 @@ public class ParticleDisplay
         if (lineLengthSq == 0) return;
 
         Vec3 incvec = to.subtract(from).normalize();//    multiply(50/sqrt(lineLengthSq));
-        int pcount = 0;
         for (Vec3 delta = new Vec3(0.0,0.0,0.0);
              delta.lengthSqr()<lineLengthSq;
              delta = delta.add(incvec.scale(player.level.random.nextFloat())))