Minor cleanups

Author: ALongStringOfNumbers

src/main/java/gregtech/api/items/toolitem/ToolHelper.java

@@ -208,7 +208,7 @@ public static void damageItem(ItemStack stack, EntityLivingBase entity, int dama
         if (!(stack.getItem() instanceof IGTTool)) {
             stack.damageItem(damage, entity);
         } else {
-            if (stack.getTagCompound() != null && stack.getTagCompound().getBoolean("Unbreakable")) {
+            if (stack.getTagCompound() != null && stack.getTagCompound().getBoolean(UNBREAKABLE_KEY)) {
                 return;
             }
             IGTTool tool = (IGTTool) stack.getItem();

src/main/java/gregtech/api/items/toolitem/TreeFellingListener.java

@@ -20,8 +20,6 @@
 
 public final class TreeFellingListener {
 
-    private static final int MAX_SCANS = 10;
-
     private final EntityPlayerMP player;
     private final ItemStack tool;
     private final Deque<BlockPos> orderedBlocks;
@@ -48,13 +46,11 @@ public static void start(@Nonnull IBlockState state, ItemStack tool, BlockPos st
         Block block = state.getBlock();
         BlockPos.MutableBlockPos mutablePos = new BlockPos.MutableBlockPos();
 
-        int operations = 0;
-
         Queue<BlockPos> checking = new ArrayDeque<>();
         Set<BlockPos> visited = new ObjectOpenHashSet<>();
         checking.add(start);
 
-        while (/*operations++ < MAX_SCANS &&*/ !checking.isEmpty()) {
+        while (!checking.isEmpty()) {
             BlockPos check = checking.remove();
             if (check != start) {
                 visited.add(check);