Revert "A/B fasta performance measurement harness"

pkg/front_end/tool/fasta/standard_deviation.dart

Index: pkg/front_end/tool/fasta/standard_deviation.dart
diff --git a/pkg/front_end/tool/fasta/standard_deviation.dart b/pkg/front_end/tool/fasta/standard_deviation.dart
deleted file mode 100644
index aa6e7846666438496e64e13bd8f3d4d3c7a5ae00..0000000000000000000000000000000000000000
--- a/pkg/front_end/tool/fasta/standard_deviation.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-import 'dart:math';
-
-double average(List<double> elapsedTimes) {
-  return elapsedTimes.reduce((v, e) => v + e) / elapsedTimes.length;
-}
-
-double standardDeviation(double mean, List<double> elapsedTimes) {
-  double numerator = 0.0;
-  for (double elapseTime in elapsedTimes) {
-    numerator += (elapseTime - mean) * (elapseTime - mean);
-  }
-  double stdDev = sqrt(numerator / (elapsedTimes.length - 1));
-  return stdDev;
-}
-
-double standardDeviationOfTheMean(List<double> elapsedTimes, double stdDev) {
-  return stdDev / sqrt(elapsedTimes.length);
-}