Remove the Dromaeo and TodoMVC samples.

samples/third_party/dromaeo/web/common/Math2.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of common;
-
-// Various math-related utility functions.
-
-class Math2 {
-  /// Computes the geometric mean of a set of numbers.
-  /// [minNumber] is optional (defaults to 0.001) anything smaller than this
-  /// will be changed to this value, eliminating infinite results.
-  static double geometricMean(List<double> numbers,
-                              [double minNumber = 0.001]) {
-    double log = 0.0;
-    int nNumbers = 0;
-    for (int i = 0, n = numbers.length; i < n; i++) {
-      double number = numbers[i];
-      if (number < minNumber) {
-        number = minNumber;
-      }
-      nNumbers++;
-      log += Math.log(number);
-    }
-
-    return nNumbers > 0 ? Math.pow(Math.E, log / nNumbers) : 0.0;
-  }
-
-  static int round(double d) {
-    return d.round();
-  }
-
-  static int floor(double d) {
-    return d.floor();
-  }
-
-  // TODO (olonho): use d.toStringAsFixed(precision) when implemented by DartVM
-  static String toStringAsFixed(num d, int precision) {
-    String dStr = d.toString();
-    int pos = dStr.indexOf('.', 0);
-    int end = pos < 0 ? dStr.length : pos + precision;
-    if (precision > 0) {
-      end++;
-    }
-    if (end > dStr.length) {
-      end = dStr.length;
-    }
-
-    return dStr.substring(0, end);
-  }
-}