Hackthings
diff --git a/‎code/draw_graph.js‎
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diff --git a/‎code/solutions/22_1_pathfinding.js‎
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diff --git a/‎code/solutions/22_2_timing.js‎
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diff --git a/‎code/solutions/22_3_optimizing.js‎
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diff --git a/‎src/chapter_info.js‎
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@@ -115,37 +115,6 @@ dir.forEach(function(file) {
   output.push(chapter);
 });
 
-output.push({
-  title: "How JavaScript is so Fast",
-  number: 22,
-  start_code: "<!-- This chapter exists in the paper book, not in the online version -->\n\n<script>\n  runLayout(forceDirected_simple, treeGraph(4, 4));\n</script>\n",
-  include: ["code/draw_graph.js", "code/chapter/22_fast.js"],
-  exercises: [
-    {name: "Pathfinding",
-     file: "code/solutions/22_1_pathfinding.js",
-     number: 1,
-     type: "js",
-     code: "function findPath(a, b) {\n  // Your code here...\n}\n\nvar graph = treeGraph(4, 4);\nvar root = graph[0], leaf = graph[graph.length - 1];\nconsole.log(findPath(root, leaf).length);\n// → 4\n\nleaf.connect(root);\nconsole.log(findPath(root, leaf).length);\n// → 2\n",
-     solution: fs.readFileSync("code/solutions/22_1_pathfinding.js", "utf8")
-    },
-    {name: "Timing",
-     file: "code/solutions/22_2_timing.js",
-     number: 2,
-     type: "js",
-     code: "",
-     solution: fs.readFileSync("code/solutions/22_2_timing.js", "utf8")
-    },
-    {name: "Optimizing",
-     file: "code/solutions/22_3_optimizing.js",
-     number: 3,
-     type: "js",
-     code: "",
-     solution: fs.readFileSync("code/solutions/22_3_optimizing.js", "utf8")
-    }
-  ]
-});
-
-
 if (allSolutions.length) {
   console.error("Solution files " + allSolutions + " were not used.");
   failed = true;