Some code fixes based on alerts from lgtm.com

js/blackboard2.js

@@ -258,8 +258,6 @@ function createBasicFunctions() {
         amt += s.charCodeAt(i);
       }
       return amt % 100;
-
-      return 0;
     },
 
     play: function(filename) {

js/bots.js

@@ -16,7 +16,7 @@
 
 function loadBot(name, map) {
   console.info("Loading bot '%s'", name);
-  req = $.ajax("bots/" + name + ".js", {
+  var req = $.ajax("bots/" + name + ".js", {
     async: false,
     dataType: "script",
   });  

js/io.js

@@ -43,11 +43,7 @@ var io = {
   saveData: function(map, key, val) {
     localStorage.setItem("data-" + map.settings.id + "-" + key, val);
   },
-
-  loadMap: function(id) {
-
-  },
-
+
 
   textToSpeech: function(text, onFinish, onFinishEach) {
 

js/viz.js

@@ -169,11 +169,8 @@ var viz = {
             'color': 'rgb(255, 255, 255)',
             'background-color': '#666',
             'text-valign': 'center',
-            'shape': "roundrectangle",
             'label': 'data(label)',
-
             'shape': "ellipse",
-
             'width': 20,
             'height': 20
           }