Bug 1680474 - Remove Glean's dispatcher TSAN suppression. r=decoder

Even though the Glean dispatcher was shutting down, the SDK was not
properly joining on the thread, triggering a TSAN error. This has been
addressed in a new version of the Glean SDK.

Differential Revision: https://phabricator.services.mozilla.com/D98889

mozglue/build/TsanOptions.cpp

@@ -308,9 +308,6 @@ extern "C" const char* __tsan_default_suppressions() {
          "race:style::traversal::note_children\n"
          "race:style::matching::MatchMethods::apply_selector_flags\n"
 
-         // Bug 1680474
-         "thread:glean::dispatcher\n"
-
       // End of suppressions.
       ;  // Please keep this semicolon.
 }