Remove unused

index.html

@@ -24,7 +24,6 @@
         <script src='js/lib/d3.keybinding.js'></script>
         <script src='js/lib/d3.tail.js'></script>
         <script src='js/lib/d3-compat.js'></script>
-        <script src='js/lib/queue.js'></script>
         <script src='js/lib/bootstrap-tooltip.js'></script>
         <script src='js/lib/rtree.js'></script>
 

js/lib/queue.js

@@ -1,84 +0,0 @@
-(function() {
-  if (typeof module === "undefined") self.queue = queue;
-  else module.exports = queue;
-
-  queue.version = "1.0.0";
-
-  function queue(parallelism) {
-    var queue = {},
-        active = 0, // number of in-flight deferrals
-        remaining = 0, // number of deferrals remaining
-        head, tail, // singly-linked list of deferrals
-        error = null,
-        results = [],
-        await = noop,
-        awaitAll;
-
-    if (arguments.length < 1) parallelism = Infinity;
-
-    queue.defer = function() {
-      if (!error) {
-        var node = arguments;
-        node.index = results.push(undefined) - 1;
-        if (tail) tail.next = node, tail = tail.next;
-        else head = tail = node;
-        ++remaining;
-        pop();
-      }
-      return queue;
-    };
-
-    queue.await = function(f) {
-      await = f;
-      awaitAll = false;
-      if (!remaining) notify();
-      return queue;
-    };
-
-    queue.awaitAll = function(f) {
-      await = f;
-      awaitAll = true;
-      if (!remaining) notify();
-      return queue;
-    };
-
-    function pop() {
-      if (head && active < parallelism) {
-        var node = head,
-            f = node[0],
-            a = Array.prototype.slice.call(node, 1),
-            i = node.index;
-        if (head === tail) head = tail = null;
-        else head = head.next;
-        ++active;
-        a.push(function(e, r) {
-          --active;
-          if (error != null) return;
-          if (e != null) {
-            // clearing remaining cancels subsequent callbacks
-            // clearing head stops queued tasks from being executed
-            // setting error ignores subsequent calls to defer
-            error = e;
-            remaining = results = head = tail = null;
-            notify();
-          } else {
-            results[i] = r;
-            if (--remaining) pop();
-            else notify();
-          }
-        });
-        f.apply(null, a);
-      }
-    }
-
-    function notify() {
-      if (error != null) await(error);
-      else if (awaitAll) await(null, results);
-      else await.apply(null, [null].concat(results));
-    }
-
-    return queue;
-  }
-
-  function noop() {}
-})();