Kill AddError/AddErrorMessage from PageTestResults.

tools/telemetry/telemetry/results/page_test_results_unittest.py

Index: tools/telemetry/telemetry/results/page_test_results_unittest.py
diff --git a/tools/telemetry/telemetry/results/page_test_results_unittest.py b/tools/telemetry/telemetry/results/page_test_results_unittest.py
index 482d02077c1ded8c3928d1018c61c044309185f4..42dde5965e731468cf8f32fa098a73af0dca8a61 100644
--- a/tools/telemetry/telemetry/results/page_test_results_unittest.py
+++ b/tools/telemetry/telemetry/results/page_test_results_unittest.py
@@ -33,20 +33,3 @@ class PageTestResultsTest(base_test_results_unittest.BaseTestResultsUnittest):
     self.assertEquals(results.pages_that_had_failures,
                       set([self.pages[0]]))
     self.assertEquals(results.successes, [self.pages[1]])
-
-  def test_errors(self):
-    results = NonPrintingPageTestResults()
-    results.AddError(self.pages[0], self.CreateException())
-    results.AddSuccess(self.pages[1])
-    self.assertEquals(results.pages_that_had_errors,
-                      set([self.pages[0]]))
-    self.assertEquals(results.successes, [self.pages[1]])
-
-  def test_errors_and_failures(self):
-    results = NonPrintingPageTestResults()
-    results.AddError(self.pages[0], self.CreateException())
-    results.AddError(self.pages[1], self.CreateException())
-    results.AddSuccess(self.pages[2])
-    self.assertEquals(results.pages_that_had_errors_or_failures,
-                      set([self.pages[0], self.pages[1]]))
-    self.assertEquals(results.successes, [self.pages[2]])