Revert of [Dashboard] Start using /list_tests's test_path_dict mode in test-picker

dashboard/dashboard/elements/test-picker-test.html

Index: dashboard/dashboard/elements/test-picker-test.html
diff --git a/dashboard/dashboard/elements/test-picker-test.html b/dashboard/dashboard/elements/test-picker-test.html
index e663c116f6842d32a3eae6eac77763e3a5a1613e..60596fb413c4703a5518ca7e4147c4d883abfd14 100644
--- a/dashboard/dashboard/elements/test-picker-test.html
+++ b/dashboard/dashboard/elements/test-picker-test.html
@@ -146,32 +146,5 @@
     assert.deepEqual(benchmarkMenu.selectedItem.name, expectedBenchmark);
     assert.deepEqual(metricMenu.selectedItem.name, expectedMetric);
   }, testOptions);
-
-  test('getCurrentSelectionReturnsNullIfInvalid', function() {
-    testing_common.addXhrMock('*', JSON.stringify(MOCK_RESPONSE));
-    let testPicker = document.createElement('test-picker');
-    testPicker.testSuites = {
-      'endure': {
-        'mas': {'Chromium': {'mac': false, 'win7': true}},
-        'dep': true
-      },
-      'dromaeo': {
-        'mas': {'Chromium': {'mac': false, 'win7': false}}
-      },
-      'blink_perf': {
-        'mas': {'Chromium': {'mac': false, 'win7': false}},
-        'mon': ['select-multiple-add/select-multiple-add.html']
-      }
-    };
-
-    let suiteMenu = testPicker.getSelectionMenu(0);
-    suiteMenu.selectedItem = suiteMenu.items[0];
-
-    let botMenu = testPicker.getSelectionMenu(1);
-    botMenu.selectedItem = botMenu.items[0];
-
-    assert.isNull(testPicker.getCurrentSelection());
-    testing_common.clearXhrMock();
-  });
 });
 </script>