Remove unused methods in webkitpy/layout_tests/.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/layout_package/json_results_generator_unittest.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/layout_package/json_results_generator_unittest.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/layout_package/json_results_generator_unittest.py b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/layout_package/json_results_generator_unittest.py
index e570bdcdd9019775f2bd65ed10708317c29747f5..fe2531a9361a246935e30ae281e58b6478f974e0 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/layout_package/json_results_generator_unittest.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/layout_package/json_results_generator_unittest.py
@@ -58,14 +58,6 @@ class JSONGeneratorTest(unittest.TestCase):
             json_results_generator._JSON_PREFIX + json + json_results_generator._JSON_SUFFIX), json)
         self.assertEqual(json_results_generator.strip_json_wrapper(json), json)
 
-    def _find_test_in_trie(self, path, trie):
-        nodes = path.split("/")
-        sub_trie = trie
-        for node in nodes:
-            self.assertIn(node, sub_trie)
-            sub_trie = sub_trie[node]
-        return sub_trie
-
     def test_test_timings_trie(self):
         individual_test_timings = []
         individual_test_timings.append(json_results_generator.TestResult('foo/bar/baz.html', elapsed_time=1.2))