Update advanced.md

Fixes #1755

googletest/docs/advanced.md

@@ -2204,8 +2204,7 @@ environment variable to `0`.
 
 googletest can emit a detailed XML report to a file in addition to its normal
 textual output. The report contains the duration of each test, and thus can help
-you identify slow tests. The report is also used by the http://unittest
-dashboard to show per-test-method error messages.
+you identify slow tests. 
 
 To generate the XML report, set the `GTEST_OUTPUT` environment variable or the
 `--gtest_output` flag to the string `"xml:path_to_output_file"`, which will